Check wezterm, it has something similar to tmux splits and it's nice.
Kitty also has this feature built in!
I should try it, I read a lot of users that like kitty in the unix porn community, but never gave it a try.
Overall, I like it. I enjoyed WezTerm as well, but found that it suffered incredible lag in Neovim. Honestly, if not for that, I probably would use WezTerm full time. But kitty does have some significantly nice features, especially if you use ssh a lot (which I do).
Will do! Currently using alacritty and enjoying that
EDIT: I'm also a tmux user and I can't live without a replacement for this plugin: https://github.com/christoomey/vim-tmux-navigator