Does Henry have the right to request accommodation and why?

Assuming Henry is 'wrongfully dismissed'. Is he still bound by the provisions of a non-compete clause? You may want to read: Globex Foreign Exchange Corporation v. Kelcher, 2011 ABCA 240 (CanLII).

Does COVID-19 make it easier for employers to dismiss employers?

Would joining a union necessarily be the best solution?

Say that Henry's job characterization is in question. It is not clear whether he is an employee or independent contractor. Could you help us to understand the major differences between an employee and an independent contractor? You may want to read this case: TBT Personnel Services Inc. v. MNR (2011), 422 N.R. 366 (FCA).