Fitbod is a really popular app that does pretty much exactly what you’re asking for. It’s not free, but here’s a referral link to get 6 free workouts before you have to pay anything. As far as I can tell. It’s the best workout planner available right now if you want to be completely hands off with it.
It will tell you what exercises to do, what set and Rep counts, what weights, etc. You can program it with exactly what equipment you have access to. And even multiple different profiles if you workout in different locations like a gym, at home, body weight only, etc.
They do have short videos in each movement you can choose to view that shows you how to correctly do the movement, but they are there for reference only. It’s not meant to follow along like a fitness+ video is.
I don’t know if I can really think of 1 single killer feature. It’s been using Garmin for so long that the entire software package just feels pretty encompassing. I’m primarily just running and strength training.
I started creating custom workouts for strength training this year and I love being able to follow along step by step with my preprogrammed strength routine right on my watch. No need to constantly check my phone for what’s next or what weight. I find it easiest to create these workouts using their website, though you can do it on mobile. You can also put specific weight numbers in, or % of your max. Great if your doing a cycle that you can reuse repeatedly without having to update each workout with new numbers each cycle.