Your kids are so little, it often feels a bit rinse and repeat at that age.
Hopefully your day is structured fairly well because of that, and presumably the little one still naps in the afternoon. My youngest is a similar age. Morning is therefore our core time for activities. Morning routine takes to 8.30 weekdays, 9.00-9.30 weekends. By then we are all dressed, washed and fed, with free play and tv time in there somewhere. The morning has a snack about 10.30 to 11, we eat lunch at 12. In the space in between, we might go to a park or out for a walk. We have discovered new parks, and different walks. Variety is important. These can easily be extended by seeing animals, bird spotting, discussion of trees/nature. You can get bird books etc to help. Some places have online pdf nature trails you can follow. Or as others have said, NT or EH places. Night walks to see the lights with torches will be coming soon, plus towns will open up a bit so go to a new one with Christmas decs up and a few kids rides in the pedestrianised area. Petting zoos will open up.
For indoor activities, pinterest is your friend. Loads of inspiration there for different activities to promote different skills, sensory activities, motor skills activities. It will involve planning and organisation for you, but there you go, another evening activity. Again, it's about getting the ideas more than anything. It will help you notice and observe your children and think about where their development needs extension. Rather than list ideas here, I think you need to go exploring for yourself. Just search activities for 2 year olds and you will get pages of ideas. Then build a board and getting planning. Take some photos as memories. Puzzles, orchard games. Get on your local FB freebie groups, people are always giving away stuff, going to collect it becomes an activity in itself. I generally have some toys out or accessible and a table with non messy craft (pens/pencils and paper) out at all times so they don't always need guided activities, they can entertain themselves a bit while I do chores around them.
Afternoon here involves a nap for the little one, snack about 3, dinner about 5. Around that is generally free play and tv.
Then after dinner possibly another activity, bathtime, reading, bed.
In the day time with two such young ones at least one of you is on parent duty, if not both. I can't seem to carve out much more time than for chores and maybe some exercise (though I get enough with walks with the kids tbh).
Evening activities with DH is the next thing. Some nights together, planned like a date. Some nights pursuing your own interests- keeps things interesting. YY to watching together in a planned way eg a boxset. Gaming if you like that. Puzzles. Board games (makes you interact in a different way). Borrow the same book from the library and read along together. Longer telephone conversations with friends. Batch cooking (I know you said you didn't like it, but I do it to make space on the day). Online activities - quizzes, book clubs. Reignite those zoom group activities with family and friends. Crafting for yourself - you can learn a lot from you tube, just find what you fancy trying (pinterest again) and give it a go. There are so many hobby options out there. Make stuff for your home, for your kids, for yourself. Creating is really fun. Do a future learn course. Sex (together or alone). Exercise. Life organisation. Do those things you've been putting off. Sort the family photos and make albums. Plan your pension, plan your new career moves, plan your holidays. Organise making your wills. Declutter. Clean whatever you've been putting off. Again, use pinterest for your own inspiration boards. Invest in self-help. Meditation. Do some self-coaching activities. Discuss your life goals with your partner and generate ideas of how to achieve them. Start bucket lists of places to go, adventures to have.
You are in a rut. But you can definitely self-generate your way out, it's just really hard when you are feeling unmotivated. Good luck!