It doesn’t sound like you’re watching a huge amount, although less is better!
Get outside as much as possible. At this age my DD could spend aaaaaages watching an ant nest, or digging for worms. She was just starting to get better at independent play, and some absolute godsends for me were:
A whiteboard/chalkboard easel - it’s so versatile. She loved being able to draw while standing up, as she was too fidgety to want to sit for long. Standing up shed draw for sometimes up to an hour! She particularly loved “water painting” on the chalkboard (literally just dipping the brush in water), and we also taped paper onto it so she could do real painting (we put it onto an old bedsheet in the kitchen, but the tray that easels come with catch virtually all of it anyway)
Sand/water pit with a few cups/buckets etc. Obviously needs to be supervised, but I got a cheap table (maybe £25) and Id sit and have a cup of tea while she played.
Stickers. DD could easily peel off a sheet, but most supermarkets have tubs of foam letters/shapes/animals, or you can order big pots online. They are a great place to start with sticking fun! I’d tape a blank piece of paper down with masking tape to make it easier. Make sure you have a bin right next to the table to drop the backings in.
Toys that can be arranged/posed. We got DD a wooden train set, and she wasn’t interested at all, expect that it came with wooden trees. Got her some farm animals and voila! She loved arranging them on the coffee table.
Play dough was a winner a bit later on, but at this age DD didn’t have the coordinatation to do anything interesting, so it only held her interest for 5 minutes.
Reading all day is a good resort if you can stand it! But vary where you do it. We have a little pop up tent, so we take some toys out into the garden, have a picnic lunch on a blanket and then read in the tent afterwards