On iOS, no.
HOWEVER: iPads do support ethernet so there's a possibility you could plug in a USB-C to Ethernet adapter to get them back online without a reset
For the future, I always suggest that you provision the devices with TWO SSIDs, one of them being a guest SSID. The iPads will naturally default to the most secure security on an SSID, but, if that's not available, should then join the Guest WiFi, allowing for continued connectivity.
Hope that helps