they will send you an email of the date and time ( sofin space,siam square to book your place) if you can't make it they will sent you link for Google meet online.
I'm signed up with discoverthainature and on my second entry and nothing was mentioned. Its not just online but they have a seminar in bbk once a month for for the 5 year duration
I would imagine so if you have enough time on your visa. It took about 10 days to receive my passport back from the u.k. They kept me updated from start to finish.