A plausible theory is that the CRM uses Rick's people living in Alexandria and Commonwealth to control him, either to stop him from escaping a secret location or to encourage him to spare valuable information.

Source: https://screenrant.com/walking-dead-why-crm-not-attack-rick-group/

Borrowing Rick's immortal "we are NOT the walking dead" line, which means that life brings hope for the future and that the dead should be the living's only enemy, Daryl convinces both sides to lower their guns.

Source: https://screenrant.com/walking-dead-season-11-ending-series-finale-explained/

Every time they die, Rick and Morty just go to Valhalla, teleport their consciousnesses back to the vats in Rick's garage, and continue like normal.

Source: https://www.slashfilm.com/1467547/rick-and-morty-season-7-raises-ongoing-series-question-can-rick-actually-die/

The story kicks off properly with Rick's awakening.

Source: https://screenrant.com/walking-dead-timeline-shows-seasons-movies/

Things don't exactly go to plan when Rick's group makes it to the CDC in Season 1, nearly blowing up along with it by the end.

Source: https://collider.com/the-walking-dead-rick-grimes-worst-decisions/

When the Governor's people kidnap Glenn (), Rick's group goes into the community in the Season 3 mid-season finale, "Made to Suffer," to rescue them.

Source: https://collider.com/walking-dead-michonne-governor-death/