It is perfectly possible to get tons of exercise in your own home or apartment with no specific equipment. With an internet connection and free YouTube videos (dance, body weight training tutorials, et al) it is even pleasant.
People often make a big song and dance about how they "need" that $400 bike or $1500 running machine, or "need" gym access to do anything. This is all a self-induced fiction (although marketers likely deserve blame here too).
There might be limited truth for the top-1% of athletes who require highly regimented training routines; but for the general public nah. COVID didn't make you sedentary, you made you sedentary.
PS - I too don't get enough exercise. I'm not throwing stones here. My point is that I don't blame COVID-19 for my own [bad] choices. I could freely exceed all recommendations if I choose to without stepping foot outside but I don't, and I have to live with that.