Modem event log and continued connectivity issues

For about a month now, our residence has had continual connectivity issues — primarily wifi related, across all devices. This has become a serious disruption to work and day-to-day home internet access. I am trying to determine the root cause of the issue, whether RF interference, signal related between infrastructure and modem, etc.

I regularly note many errors in the modem event log, which I am including below.

Plan: GIGABIT

Troubleshooting measures:

- Tried two (2) modems: Arris S33 and Motorala MB8600

- Tried three (3) routers: Apple Airport Extreme, Eero Pro 6, TP-Link Archer AX 5400 Pro

- Two tech visits: first found some water damage in cabling, the second checked the connection at the wall and said everything looked fine. Regular disconnection issues, as well as modem errors in event logs, continued after both visits with each modem.

- Checked neighboring wifi signals for channel overlap.

Additional Notes:

- The issues are primarily experienced over wifi, though the event logs and recent tech experiences and timing lead me to believe there is a signal issue.

- Does not matter if device is 1 foot or 30 feet from router. Disconnects still occur.

- Xfinity noted signal issues on one of our many calls, as well as the first tech visit.

- On direct ethernet connection, through both router and modem, my PC often reads adequate speed tests (~900mbps)

- Through wireless connection, phones and laptops often read adequate speed tests, but constantly drop connections, regardless of distance from router (on all 3 tested routers, as well as both modem configurations).

Modem Event Log from current Motorola MB8600:

Downstream Bonded Channels:

Upstream Bonded Channels