To answer your question you have two options.
a. do everything from the same WG interface at home OR
b. use two tunnels, one to reach home and one to reach CHR from home.
Exactly. My initial preference was to go with option b.
Both are possible for the most part, but without knowing the full requirements its still a guess.
So need better set of requirements (what do users or devices need at home need wrt wireguard, what do road warriors need (assuming just the admin), etc..
A network diagram helps and finally
FULL config of both CHR and home mikrotik is required ( less of course any public WANIP info or key info )
Will send them tomorrow.
Newsflash
There is no server nor client with wireguard.
Only peers.
Valid point.
You can have more than one interface but obviously with unique listening ports.
You think I'd be alert to keep something as simple as that in mind while configing the second "peer".. I wasn't!