Button shouldn’t dissapear in the transistion period. Here’s a little addon I made that works for WoD, Legion and BfA mission table systems. Also the button isn’t visiable when you start doing Legion content until you get your first followers. It never worked like that by default in Legion unless you uses some addons. If that has changed for levels 100-110, there is another way, also usable above level 110: That is, if you being up your Class Hall missions by pressing Left Mouse, press Right Mouse for Garrison missions. Just press the other mouse button that brings up your Class Hall. Yes, the Garrison view was still available in Legion.
