Flipnote PC Alternatives

I know this has probably been asked a lot but I would love to find an animation software for pc/windows. The feature I like the most about flipnote that I don't often find in other softwares is easy actual frame by frame animation, not tweening or like, having a pool of 'drawings' where if you copy one drawing and put it on another frame and edit it, it edits the first frame the drawing was used in. I also really appreciate the pixel movement/ability to move things by a specified amount but that's not nearly as important to me as the first point. Does anyone have any suggestions for softwares like this that have an actual timeline and audio importing? (not like a drawing software where you just draw each frame and add audio in another program)

Thanks for your help! I want to get back into animation but nothing feels as good as Flipnote. Now that I'm actually looking for portfolio worthy work though, I can't really keep using my favorite shitty software haha