I don’t see anything I’d lose sleep over, so long as you aren’t stopping at 7.10.5! It’s been EOL for a year and a half. Please see Release policy - Mattermost documentation
You really should have gone to 7.1.9, then 7.8.15, then 8.1.13, then 9.5.12, then 9.11.4 At that point you could go to 10.x or wait for 10.5 which will be our next ESR. See Version archive - Mattermost documentation for older versions.
Upgrade steps are at Upgrade Mattermost Server - Mattermost documentation