I had to remove the mirrors for doing the spark plug change on my wife's 2021 RT. Before installing the mirror covers I took a small flat blade screwdriver and sliding it between the clip where the spring clip that connects the cover to the body I was able to rotate the screwdriver blade increasing the spring clip width.
Now the covers are on very tite.
2021 Sea To Sky, 2020 RTL
Isn't it weird that in AMERICA our flag and our culture offend so many people...... but our benefits don't?