How about an alarm on your phone you just dismiss.

Zooz, inovelli, leviton, ge, all the brands make dimming smart switches.

You’ll need a smart plug or outlet that supports power monitoring and a hub. You then need to make that a rule.

You want to put on a switch that supports double tap but the solution here i think is a zooz zwave remote switch. You can put it right next the your current switch and put on a 2gang face plate.

With that you set rule in rule machine to control the smart bulbs.

https://www.thesmartesthouse.com/products/zooz-z-wave-plus-700-series-remote-switch-zen34-battery-powered

Two curtain rods system with light filtering sheer. Switchbot curtain.

Some of the older dual band routers that has the same SSID for 2.4 and 5 ghz well default to 5ghz when trying to connect. I know that was the case for my previous router system and I was having a hard time connecting IoT devices as well. Until I went into the router settings, and disable the 5 ghz band temporarily to connect the IoT device and then turn the 5 ghz back on.

If that doesn’t work, you may have a faulty Wi-Fi module on the purifier

A lot of these IOT devices are in 2.4ghz spectrum. Have you tried to connect it to a confirmed 2.4ghz network?