Yeap, one of my biggest concern is on Chinese smart home equipments with stock firmware. Hardware wise, for simple hardware like wall switches, they are fine, for e.g.: sonoff uses esp8266/8285 with pretty decent designed PCB, safety, etc. My house in MY is basically fitted with Sonoff’s equipment, all wiped and re-flashed with custom firmware for HomeKit. Currently testing it for stability as previous wifi network (Mikrotik AP+Apple time capsule) gave a lot of problem with mDNS, but upgraded all the AP to Aruba enterprise AP, never had any problem so far

from my experience, enterprise grade AP are a lot better if you have the budget. priority is probably to have good coverage especially if you HomeKit devices work only with WiFi (multiple APs >>> single high TX power AP), then stability, proper WiFi management implementation from the manufacturer, etc.

currently I'm using 3x Aruba APs to provide coverage around the house for WiFi only Sonoff devices. The APs would automatically detect each other, form a cluster, constantly monitor, adapt channels and pass the WiFi client to the whichever AP that could serve the end device best. For devices like smartphone, laptops, the APs will band steer the end device on either 2.4/5GHz, basically seamless roaming.

need to be careful with this though as common auto gate controller works with pulse input instead of plain on/off. if it is set as a switch where it's turn on to open the gate, the switch would pull the gate controller input low until you set the switch to off. During that period, other auto gate RF remote won't work at all

yeap. for my setup, I modified my Sonoff basic, isolated 1x input (gate's contact sensor) and 2x output (one/two side gate control), 0.1s inching time for the output