Subscriptions such as Netflix, Amazon Prime, Spotify, Audible, Kindle, Disney+ etc.
Stuff for the DCs usually some clothes, shoes, bits for their bedrooms, home learning materials, art and craft supplies, sports equipment, science kits, magazines, etc.
For myself this year it's been items for the house which we didn't really need (as well as some that we did), some books and magazines in print to give my eyes a screen break, supermarket clothes and some mid range toiletries.
Usually I spend money on day trips and activities and being out basically. I think I've been spending quite a bit more on things at home to keep us busy. Also spent a lot more on groceries. So I haven't actually saved any money being in lockdown. I've also added quite a lot of subscriptions (especially tv ones) which I've now stripped back again, and had to replace all our tech devices