When I reached 2 x body weight (on the bar) when doing conventional squats last year, I realised that although my legs could have taken more, my back wouldn't. At this point, I switched to single squats with 1.1 x body weight on the bar.
The problem with this is technique, or rather my lack of it, which is not helped by having one leg noticeable stronger than the other. For safety reasons I am doing this between to metal shelving systems, which are rated to 180kg per shelf, which is just as well as I am still wobbling - although this is slowly improving.
I have also tried pistol squats, which also require more co-ordination skill than I currently have, and I have attached a link below to a Runners World article for anyone who's interested. As a no-equipment, safe exercise it's worth looking at.
https://www.runnersworld.com/trainin...-pistol-squat/