No idea for the technical term for mine, but it popped out forwards (impact from the back). Nice man in Cirencester minor injuries put it back about an hour later.
I was back on a turbo trainer in 2 weeks (wearing a sling), riding gentle on the road after about 5, off road in 12, mountain mayhem in 13, 12 hour solo at 24/12 in 18. It’s been about 14 months now and there’s no real difference between the dislocated and non-dislocated shoulders.
Get to a physio as soon as you can – I had a private appointment before the NHS one. Do your exercises when they tell you. Get a cute physio like my NHS one. When I dislocated mine lots of people posted lots of interesting advice about other medical/manipulation methods that had worked well for them – I think Brant was one who had some experience of it.
I kept doing the exercises for about a year after, only stopped as my gym going has been replaced by more bike riding. Strengthening the area around the joint is crucial.