@patwerthman A doctor's office who specializes in osteoporosis recommended the Ultimate Vibe by BC Vibrant Health. The BC stands for Becky Chambers. She has also written a book on WBV.

I have owned the Ultimate Vibe since September and I use it on my non-gym days. It has both low and high amplitude vibration options, but I only use it on high amplitude. You can set the frequency from 15-40 hz.

The machine with more specs:
https://bcvibranthealth.com/product/ultimate-vibe/
The book:
https://www.amazon.com/Whole-Body-Vibration-Future-Health/dp/B0CQVNGTG4
I will never know how much difference this makes to my OP because I am changing many things at once, such as lifting heavy weights, doing drop jumps for impact, HRT, and Vitamin K.