I think Ichigo Mashimaro is quite iyashikei because of things like pacing, music, ambient sounds, wholesome moments, those little vignittes between scenes. It just kinda breathes nicely, there is space between jokes and lines. Soft music, kind moments. The environment feels real and “encompassing” (a bit like in non non biyori). For me CGDCT is kinda iyashikei in general but Ichigo Mashimaro is definitely significantly more iyashikei than average to me. A SOL CGDCT that is less iyashikei and more comedy to me is something like Ika Musume. Peak iyashikei to me is ARIA, highly recommended for pure brainmelting wholesomeness.