When do you think we will get gen 3 profile pics

if you have an account at https://www.pokemoncenter.com you can choose an avatar. some use the same art as this forum but some are different and the background colours are different. they also have most forms but not the hisui original mons though.

No. There are pictures you can only use if your account is old (the Unite photos, they were here a year ago but were removed when gen 1 pictures were added, so newer accounts can't use them), but there are no rank-exclusive pictures (or rank exclusive anything).