I was very fortunate to be a tester for the Thule Cougar Chariot on MN back in 2016.
I jog occasionally, cycle a lot, and walked my dogs (now just dog) daily.
This model was excellent as it can be a pushchair on two front wheels, a jogger on one large front wheel, and can harness up to an axle point on a bike to become a bike trailer (there are other features such as skiing attachments!)
The mini wheels and bike harness can also be attached so that you tow the carrier into town, park up, then switch it to stroller mode to push around town.
Since 2016 I have used ours so much, for all sorts.
I loved being able to jog with my LOs, the cabin inside is v roomy and comfy, more often than not I'd get home and they'd be asleep.
It is a bit cumbersome and as they got bigger it was harder to turn.
It was a fairly large model so a bit unwieldy in a narrow shop aisle for example. It folded up to get in the car but still a bit of a push getting it into my large estate boot. Had to take wheels off etc
Loads of storage for shopping bags etc
Absolutely waterproof, never got kids wet even in torrential rain with two disgusting dogs running around nearby!
I used to see lots of ppl running at like Go Ape type places and some had put pretty little fairy lights around the frame.
Generally this sort of item is a good buy, definitely worth it if you're going to be active with them.
If you're in the SE I will gladly give you mine. You'd probably only need to check you're happy with the straps as it's been sat in our garage for a year or so (possibly nibbled at...)
I also got a treadmill when my youngest was about 2.
This has also been a good buy, it was off Marketplace as I wouldn't have afforded this model brand new. Still working 5ish years later. It's good to pop on for a short jog when the kids are on school holiday and I don't want to leave them, or in eve after bedtime.
This is v roomy despite it being a fold up one. Luckily it fits in the garage and we keep it out most of the time.
Good luck, it definitely feels worth getting something to do an activity you enjoy doing.