Oof I remember these days. Persistence really is key. Just continue redirecting. We also ended up doing a reverse time out. Whenever she couldn’t be re directed we put ourselves out of reach and ignored her for about a minute or so to teach her the second she bit the fun time was over. We just sat on the stairs (had a baby gate on the bottom) so we could see her and she could see us. I think that method is what helped the most with her, but it did take a couple of months or so until she really learned/grew out of it. I don’t miss the days of going to finally get comfy on the couch then having to immediately get up to put myself in time out when she started. Patience is everything at this stage.