I have the bike and the spin tray. I use during meetings and it’s totally awesome. The downside is it’s tough to lean forward (if at all) with the tray in the way.
Someone on this subreddit recommended a laptop stand like this instead: https://www.amazon.com/dp/B08F21WPQF/ref=cm_sw_r_cp_api_i_xgZIFbQBE1BD2
If I didn’t already have the spin tray, I think I’d get this.
I normally just bring in a collapsible table and chair, regular stuff you can pick up at a walmart. Magnetic stuff doesn't really work for me since I am primarily in stainless steel environments (food industry). This or this is something I have been looking at, but I haven't tried it yet.
Otherwise I always find something to make it work. I also keep a 300 ft cat 7 ethernet cable on me, just in case I need (or really want) to work from a distance and give myself options.