"If your Rpie is having trouble, so are other devices in your house."
Not to nitpick too much but just to add another data point to your comment....
I did a RPi 3 Wifi test in my garage when I had it driving my Marshall Powered speaker. The RPi 3 was marginal over Wifi even with an outboard Wifi dongle antenna. Several dropouts and intermittent usable connectivity. On the other hand....
My iPhone (iPhone X at that time) in the same garage location was 100% solid over Wifi with zero music dropouts.
But again, that was on the RPi 3. I haven't tried the RPi4 in the garage.
