I'm across the country so I use a combo of information sharing, cajoling and outright fright. It's a delicate balance, if I go too far with monitoring/fear tactics, my mother rebels. For example I'm her remote tech help and set up her Android phone. When she found out I could see where and how often she was going out via Google--she stopped taking it with her when she ventured out. And I had to learn to step back and bite my tongue because her going out without anyway to communicate was not ideal either.
On the other hand, she started taking her phone again because my brother was absolutely livid when we couldn't reach her during the protests/curfew period and we were frantic with worry. When he found her, he read her the riot act and then also informed the entire family via the family group chat, embarrassing her. So sometimes, we have to be ultra aggressive to get her to do something that is good for her.
In other words, you do what you can but at the end of the day, they're adults. My mom likes to go to the casinos--I'm telling myself to not blow my top when she inevitably makes her first trip in our new normal times. In mean time, I drop info nuggets why places likes casinos are death traps in Covid times. I send her info and I also try to be more available for chats. The going out is mainly just something to do for a retired senior who worked really hard all her life and now doesn't really have a social network and any meaningful hobbies/interests aside from watching TV.