1. Quarantine is required at the moment but the length of it changed regularly. How do you prepare for that?So we have a June 2022 Blue Manta booking for Komodo. Any way this is going to be a good idea? Is the port even open to tourists? If we get caught in a post arrival test we are ruined...and don't want to spend weeks on land waiting to go.
Should we just hope for something available in 2023? Get whatever $ we can back and give up until some year when things are the new stable?
2. Can you get any refund at all? Otherwise you just have to sit and wait and you won't be alone unfortunately.
Thailand is opened with only one day of 'quarantine' required, peak season in the west coast, but it is a long haul from US. Just remember thing can change quickly without warning.
Unfortunately:

Missing Covid-infected tourist surrenders on Koh Samui
An Israeli tourist who sparked a manhunt by leaving his Bangkok hotel without waiting for his Covid-19 test result, which proved positive, surrendered to police on Koh Samui on Wednesday afternoon.
Latest on Thailand:

2,532 new Covid cases, 31 more deaths
There were 31 more Covid-19 fatalities and 2,532 new cases registered during the previous 24 hours, the Public Health Ministry reported on Wednesday morning.