As a sanity check, connect the tablet to the ASIAIR WiFI hotspot. Check WiFI Settings in the ASIAIR Setting window to make sure the ASIAIR has Station Mode turned on. If not, you need to set it up.
The ASIAIR should then appear in your router's table.
If that is not the problem, you can try resetting the ASIAIR WiFi configuration. This will erase all previous network select, passwords, etc, in the ASIAIR; so keep your WiFi router's password handy.
In the third generation ASIAIR, there is a WiFi Reset switch under the hole just above the Reset button (which in turn, is above the WiFi SMA antenna connector).
Use a thin paper clip, or a safety pin to reach the internal WiFi reset switch.
This will allow you to start from scratch.
If the ASIAIR still does not see your home network, and your home router is an eero, open the eero control app on your tablet, select the "Settings" window, then "Troubleshooting," then "My device won't connect," and finally tap on "My device is 2.4 GHz only." In that final window, tap on "Temporarily pause 5 GHz." Then see if your ASIAIR can now see the router. If so, set it up within the next 10 minutes before the eero switches back to 2.4/5 GHz (could be 5 minutes, I forget now).
When first setting up, it is often also better to bring the ASIAIR within 1 meter of the router to reduce interference from other devices in the house (or neighbors' homes).
Chen