You care about this problem enough to post about it. That suggests you care enough to make a change.
Don't ignore what you do already do - you tumble with them and tickle them, you take them out at weekends with your partner. It is not your job to entertain your children 24/7. You are not a clown. Weekday nights are mainly for being calm and letting them wind down so they have the energy for school next day.
But you can add a few changes. Like PP have said, I'd start small. On the way back from school once a week, go via a playpark and don't take your phone with you to collect them. In an emergency everyone else has phones so borrow theirs. Or if that feels too much, just don't take your phone, head straight home, but chat to them on the way back. Ask them silly questions like 'Who was naughtiest or silliest at school today?' Or 'Did anything funny happen?'
At home, put your phone in a zip pocket of a coat and hang it in the wardrobe. Sit down on the floor with some toys and play for a while. Doesn't have to be for long - just 10 minutes or so, setting up an idea for what they could build out of lego, or helping make a dolls hospital with cushions for beds and hand towels for blankets. 10 mins then leave them playing.
You could play at times when you are dealing with them anyway - maybe put food on their dinner plates in the shape of faces, or sit a cuddly toy up to table and ask if they can read his mind because you wonder what he's been doing all day.. There's loads of low-effort fun to be had just putting a cuddly toy in a silly place and asking 'What's teddy been up to? Anyone seen him?' then letting them run off and find him.
When they are in the bath, play with bath toys a bit and just chat to them - you are supervising them anyway. I used to ask stuff like: What would you spend a million pounds on? or if you could have a superpower what would it be? Or what would be in your dream home? They love stuff like that.
I used to pretend I had a favourite CBeebies show. They'd watch TV and then call me in to watch 'my favourite' show and we'd all snuggle on the sofa to watch it and then I'd get back to making dinner or sorting laundry. It was just 15 minutes of cuddling together.
At night, read a story or a chapter of a story.
That's more than enough. Letting children entertain themselves is actually really good for their development and we don't do it often enough these days.