Certainly not an everyday item, but I’d love to see the return of the genie lamp from TS1 Livin’ Large. That easily has to be one of my favorite Sims objects of all time. I loved the costume chest as well, so that’d be cool to see again.
For ordinary stuff - NOTEBOOKS. Ones that are actually usable for writing. It’s sorta plum that Sims HAVE to use the computer to write - some of us actually prefer to write the old-fashioned way, after all. Besides, Sims just starting out can’t always afford a computer after buying a house and the necessities and such, and having to keep going to the library for it is a hassle. (There is/was a usable notebook mod, but I deleted it forever ago because it was ridiculously buggy at the time. I have no idea if the latest version has been improved or if it’s even up-to-date.)
I’d also like to see laptops come back, like we had in TS3. Proper, fully-functional laptops, not just the tablets that have limited features.
Those are the main things I’d like to see added, but for some more minor suggestions: stuffed animals that aren’t massive, foosball tables, music boxes, empty cardboard boxes, more instruments, decorative/painted rocks... and that’s all I can think of for the moment.