On the GlobalProtect Satellite, go to Network > IPSec Tunnels > GP-Satellite and click on "Gateway Info":

Check the gateway config and click "Refresh GW Config", as shown below to retrieve any changes made on the gateway such as receiving an access route:

The GlobalProtect satellite now has a route to reach the subnet 10.66.22.0/23 behind the GlobalProtect gateway.
By default, the GlobalProtect satellite refreshes the config from gateway for the hours value specified in the GlobalProtect gateway satellite config, as shown below (default is 1 hour and max value is 48 hours):

Note: To refresh the gateway config through the CLI, and to verify the access routes added on the GlobalProtect satellite, use the following CLI commands:
> request global-protect-satellite get-gateway-config gateway-address 10.66.24.94
satellite GP-Satellite
Use the command: > show global-protect-satellite current-gateway gateway 10.66.24.94
satellite GP-Satellite to display the gateway connection status
> show global-protect-satellite current-gateway gateway 10.66.24.94 satellite GP-Satellite
GlobalProtect Satellite : GP-Satellite (1 gateways)
Gateway Info: 10.66.24.94
Get Config State:
Refresh Time (seconds) : 7200
Failed Refresh Time (seconds) : 300
Current Get Config : success
Max Get Config Retries : 34
Number Get Config Failed : 0
Config Timer Activated : yes
Next Get Config Time (seconds) : 6081
Cached Get Config Time (seconds) : 0
Failed Reason
Portal Config:
GlobalProtect Gateway Name : Gateway-FW-94
GlobalProtect Gateway Address : 10.66.24.94
Priority : 1
Gateway Config:
Gateway Tunnel Name : GP-Gateway-S
Gateway Tunnel Interface : tunnel.6
Gateway Tunnel id : 9
Gateway Tunnel IP : 7.7.7.1
Gateway Additional Tunnel IPs :
Status : Active
Status Time : Jan.14 03:12:57
Reason : Established
Config Refresh Time (hours) : 2
IP Address : 172.17.1.1
Default Gateway : 7.7.7.1
Netmask : 255.255.255.255
Access Routes : 192.168.94.0/24
: 10.66.22.0/23
Denied Routes :
Duplicate Routes :
DNS Servers :
DNS Suffixes :
Tunnel Monitor Enabled : No
Tunnel Monitor Interval : 0 seconds
Tunnel Monitor Action : wait-recover
Tunnel Monitor Threshold : 0 attempts
Tunnel Monitor Source : 172.17.1.1
Tunnel Monitor Destination : 7.7.7.1
Tunnel Monitor Status : No data available