Work and hobbies seem to be the way (based on myself and friends/family).
By work, I don't mean people you directly work with, i.e. your immediate colleagues or line management, I mean people you come into contact with on a more casual basis, i.e. people you see in the kitchen or drinks machine, or people you "vaguely" know by just chatting as you pass in the corridor, or even the guy who comes regularly to repair the photocopier, or suppliers/customers, etc. I was an external auditor back in the day which basically meant working at a business's site for typically one or two weeks, and got asked out a couple of times by staff working there. My sister ended up marrying a bloke who went into her workplace every few weeks to deliver stationery! If you keep a kind of "distance" and don't date people you're literally working alongside daily, it's easier to back away as you won't see them constantly and it's easier to get other staff to deal with them if there's a bad break up.
Hobbies can be a lot more than jogging/running! My "hobby" back in the day was being a Special Constable! Great way to get some "one on one" time working with someone to break down barriers. I must have worked shifts with dozens of people (maybe over a hundred) over the years I did it. By being a Special rather than regular, there was a lot more options of days/shifts as we weren't bound by the shift patterns, and I even had a choice of 3 different main police stations (and a few smaller village stations). Again, very easy to "avoid" someone in case of a bad break up or otherwise wanting to back away if someone gets a bit too "close" or you get a stalker! By a similar token, another "hobby" was joining the Institute of Advanced Motorists, firstly as a trainee and then as an observer (similar to instructor) and then committee member of the local group- again lots of "one on one" time with other people, typically an hour driving around in a car. A few friends have found their long term partners from other hobbies like rambling, birdwatching, amateur dramatics, etc.
I've never actually done traditional dating where you go out with a random stranger or even someone I've known briefly, i.e. meeting in a pub or club. Every single one of my dates/boyfriends was someone I actually got to know pretty well beforehand before we moved onto dating. As for meeting my husband (now together for 37 years), I must have known him for over a year before our first "date", part of that time I was dating someone else (as was he), but even during that period, I spent a fair amount of time with my, now, husband as friends in the hobby setting, often seeking each other out if we found ourselves doing the same thing at the same time! And we didn't specifically ditch our respective partners to be together, it was just a lucky coincidence we found ourselves both single at the same time.
I do think people need to "get out" more and meet people in real life. It's too easy with WFH, home shopping, etc., to stay in too much, and if you're not the kind to go out on the pull to pubs and clubs etc., you're not going to meet people.