Hi sung 33,
I have no idea if I'm still building bone, hopefully I am, and what I do evolves as I go along.
I did take hrt for 5 years from about age 50, and then started again maybe 2 yrs ago, with a break because of unexplained bleeding, once everything sorted out I resumed.
I now go to gym regularly, I was going every day, but now build in some rest days.
I have a 4 day sequence, legs ie resistance machines , upper body resistance machines, cable machine, free weights.
I don't focus on heavy weights, rather, I try and get maximum benefit from what I do, taking my time etc
I'm at gym an hour each session.
Also some stretches and balance exercises afterwards.
I also do a few exercises at home before going out eg heel drops, step ups, lunges, squats, dead bug, bridge,, bird dog.
I try and optimise diet, with eg home made stock for soup, good quality protein.
All sounds a lot, but I'm no exceptional athlete I assure you, build up gradually and do what you can. I'd much rather do other things but I want to maximise some gains if possible while I can.