Canon do not in any way warrant or suggest that any third-party lens adapted from the EF mount will work with their R-series bodies. They cannot do so because they don't control the design of such lenses. If you want an assurance, you may get some feedback here, but it will also depend on the camera model being used. For example, crop-sensor bodies, such as your R50 are often more challenged than FF ones.
You should also look at the Tamron site for the lens you are interested in to see if the make a comment on compatibility, as Sigma do.
If you decide to take the risk, please ONLY use a Canon EF-RF adapter, other 3rd-party units have known issues.
cheers, TREVOR
The mark of good photographer is less what they hold in their hand, it's more what they hold in their head;
"All the variety, all the charm, all the beauty of life is made up of light and shadow", Leo Tolstoy;
"Skill in photography is acquired by practice and not by purchase" Percy W. Harris
