I moved away from MacOS on my desktop/workstation to Linux and one of the things I've missed actually was iTerm2. Really great terminal altogether. However, I found a great replacement, even better in some ways - Kitty!
KDE’s terminal app Konsole is great and really ITerm-like at least with my usage patterns.
The one thing that annoys me about Kitty is the lack of greyscale anti aliasing. My eyes are damaged and properly configured fonts that aren't jagged or blurry are a godsend.