Doorbell at Front Gate Keypad

Has anyone had success putting a Ring Doorbell at the end of a long (approximately 100 feet) driveway, ending in a front gate? We moved into a new house with a front gate and keypad out front.I know metal interferes with the signal, but I bought a Doorbell 3 because of better wifi connection to try it. I stuck it on the side of the keypad, tried putting one of our Google Wifi nodes out front, a Chime Pro out front, etc., but the RSSI stayed at 88 and froze. I bought a wood mailbox post to potentially mount it next to the keypad, but I didn't see much improvement in signal.I have a stick up cam and spotlight cam that maintain reasonable connection at that location with no extra boost. Worst case scenario, I'll do that, but I'd prefer to have a doorbell to allow folks to let us know they're at the gate. Normally, the keypad would ring a doorbell, but we have no home phone.I don't need the gate operator, as our gate already can be operated remotely via MyQ.