I'm a PT. Do I have it right that you lost 7 stone on your own, by good diet and exercising? If so, you're unbelievable and should be so, so proud of yourself. Posts like this make me so happy to read!
I wouldn't personally worry about upping running unless you have a huge passion for it as the hiking you do is really very effective and way, way better for your joints.
What I'd add in now is weights...because being post menopause ish in age means bone loss mgmt should now be a central focus. You need to focus specifically on spine (often forgotten) as well as the usual joints where bone loss can present. If you tell yourself this is for an epic quality of life later on it might give you a better boost to stock with it, if you feel you don't get a big exercise high (saying that you might really feel that way with weights as it raises so many different hormone levels that cardio can't).
You can get a PT to work with you or you can get great dumbbell workouts at home (I read you already do a home one). The key is great technique and upping the weights to put down new bone/stop bone loss. You need to make sure you're adding in back work (upright rows, bent forward rows, etc) as well as shoulder, bicep, tricep, abs, glutes, calves, hamstrings and quads. But tbh you do great hiking so the biggest focus for me, for you, would be upper body weights at this point.
Also do you have a seated job? If so, and you do a lot of uphill walking, you might end up with a bit of lower crossed body syndrome (tight psoas is usually the basic reason for that) and get a v stiff lower back so it'd be good to add some added work to counter that. If you do think that's the case, lots of good back, leg and hip stretches, as well as shoulder stretches, and also strengthening abs and really stretching will really help rebalance the body.
Finally when you eat well add good protein and fiber as that'll keep you fuller longer and will encourage the body to use food as fuel and not store as fat.