Looking back at everything Rosita went through in the first few seasons, it’s an impressive list. She escapes a cannibalistic slaughterhouse on Terminus, sees Alexandria captured, and helps reclaim her, while Negan (Jeffrey Dean Morgan) brutally murdered two lovers. This no doubt plays a role in her single-minded desire to get revenge on him and see the Saviors crushed throughout much of Season 7. In the season finale, she is shot outside the Sanctuary, but survives.
All things considered, her relative absence from season 8 is quite noticeable. She briefly appears in the season premiere recovering from her injury, but is then not seen again until episode 6. She of course returns to her tough personality pretty quickly, even leading a group of survivors alongside Daryl as they flee sacked Alexandria for the Hilltop. , but in a way, that makes her absence for much of the first third of the season even more egregious.