What are some the things you do to keep your toddler busy and engaged all day

I feel like I’m not doing enough with my 3 1/2 daughter

We have a pretty flexible routine

I let her have some screen time in the morning while I eat then she play by herself until 12ish while a do some cleaning.after that she spend some time with her father before he leaves for work we then Do some activities either reading or talk to the grandparents or coloring or writing letters followed lunch and nap shortly after usually if the weather is nice after nap we’ll go outside grocery shopping or on a walk or to the playground if not we’ll just stay in read or I’ll let her play by herself until dinner time she’ll help with dinner sometime or she’ll watch tv while a cook

This pretty much how our days go most the time she knows her alphabet she can count to 20 but sometimes I feel like I’m not stimulating her enough academically or engaged with her

What some other things we could add in our routine it get soo boring at Times I’m 34 weeks pregnant and I can’t imagine how it gonna be like with 2 any advice?