How to access MCP23008 expander GPIOs?

[knro]

The title says it all. When I use gpiodetect tools, I get this on CM4:

gpiochip0 [pinctrl-bcm2711] (58 lines)
gpiochip1 [raspberrypi-exp-gpio] (8 lines)

gpioinfo returns this:

gpiochip0 - 58 lines:
        line   0:     "ID_SDA"       unused   input  active-high 
        line   1:     "ID_SCL"       unused   input  active-high 
        line   2:       "SDA1"       unused   input  active-high 
        line   3:       "SCL1"       unused   input  active-high 
        line   4:  "GPIO_GCLK"       unused   input  active-high 
        line   5:      "GPIO5"       unused   input  active-high 
        line   6:      "GPIO6"       unused   input  active-high 
        line   7:  "SPI_CE1_N"   "spi0 CS1"  output   active-low [used]
        line   8:  "SPI_CE0_N"   "spi0 CS0"  output   active-low [used]
        line   9:   "SPI_MISO"       unused   input  active-high 
        line  10:   "SPI_MOSI"       unused   input  active-high 
        line  11:   "SPI_SCLK"       unused   input  active-high 
        line  12:     "GPIO12"       unused   input  active-high 
        line  13:     "GPIO13"       unused   input  active-high 
        line  14:       "TXD1"       unused   input  active-high 
        line  15:       "RXD1"       unused   input  active-high 
        line  16:     "GPIO16"       unused   input  active-high 
        line  17:     "GPIO17"       unused   input  active-high 
        line  18:     "GPIO18"       unused   input  active-high 
        line  19:     "GPIO19"     "pps@13"   input  active-high [used]
        line  20:     "GPIO20"       unused   input  active-high 
        line  21:     "GPIO21"       unused  output  active-high 
        line  22:     "GPIO22" "onewire@16"  output  active-high [used open-drain]
        line  23:     "GPIO23"       unused  output  active-high 
        line  24:     "GPIO24"       unused   input  active-high 
        line  25:     "GPIO25"       unused  output  active-high 
        line  26:     "GPIO26"       unused  output  active-high 
        line  27:     "GPIO27"       unused  output  active-high 
        line  28: "RGMII_MDIO"       unused   input  active-high 
        line  29:  "RGMIO_MDC"       unused   input  active-high 
        line  30:       "CTS0"       unused   input  active-high 
        line  31:       "RTS0"       unused   input  active-high 
        line  32:       "TXD0"       unused   input  active-high 
        line  33:       "RXD0"       unused   input  active-high 
        line  34:    "SD1_CLK"       unused   input  active-high 
        line  35:    "SD1_CMD"       unused   input  active-high 
        line  36:  "SD1_DATA0"       unused   input  active-high 
        line  37:  "SD1_DATA1"       unused   input  active-high 
        line  38:  "SD1_DATA2"       unused   input  active-high 
        line  39:  "SD1_DATA3"       unused   input  active-high 
        line  40:  "PWM0_MISO"       unused   input  active-high 
        line  41:  "PWM1_MOSI"       unused   input  active-high 
        line  42: "STATUS_LED_G_CLK" "ACT" output active-high [used]
        line  43: "SPIFLASH_CE_N" unused input active-high 
        line  44:       "SDA0"       unused   input  active-high 
        line  45:       "SCL0"       unused   input  active-high 
        line  46: "RGMII_RXCLK" unused input active-high 
        line  47: "RGMII_RXCTL" unused input active-high 
        line  48: "RGMII_RXD0"       unused   input  active-high 
        line  49: "RGMII_RXD1"       unused   input  active-high 
        line  50: "RGMII_RXD2"       unused   input  active-high 
        line  51: "RGMII_RXD3"       unused   input  active-high 
        line  52: "RGMII_TXCLK" unused input active-high 
        line  53: "RGMII_TXCTL" unused input active-high 
        line  54: "RGMII_TXD0"       unused   input  active-high 
        line  55: "RGMII_TXD1"       unused   input  active-high 
        line  56: "RGMII_TXD2"       unused   input  active-high 
        line  57: "RGMII_TXD3"       unused   input  active-high 
gpiochip1 - 8 lines:
        line   0:      "BT_ON"       unused  output  active-high 
        line   1:      "WL_ON"       unused  output  active-high 
        line   2: "PWR_LED_OFF" "PWR" output active-low [used]
        line   3:       "ANT1"       "ant1"  output  active-high [used]
        line   4: "VDD_SD_IO_SEL" "vdd-sd-io" output active-high [used]
        line   5:   "CAM_GPIO" "cam1_regulator" output active-high [used]
        line   6:  "SD_PWR_ON" "sd_vcc_reg"  output  active-high [used]
        line   7:       "ANT2"       "ant2"  output  active-high [used]

is there anyway to access gpiochip1 GPIOs from the library?