FYI
There appears to be some major changes not easily noticed now the London Thai Embassy has moved to online application regarding multiple entry Non O visas.
I have just picked up on this posted elsewhere.
Perhaps the beginning of the end of these class of multiple entry visas?
Other than the OA visa on the e visa website the only non immigrant visa that is shown as being possible for a multiple entry is the a non-b.

See:
TLDR : Answer Summary
The message discusses recent changes in the application process for multiple entry Non-O visas at the Thai Embassy in London, indicating a shift to online applications. There are concerns from long-term expats, especially under 50 years of age, about the implications of these changes, including the possibility of having to apply for new visas more frequently.
NON-O RETIREMENT VISA RESOURCES / SERVICES
- Go to the Retirement Visa Section for information on requirements, including age restrictions, financial requirements, and necessary documentation.
- For immediate assistance, contact Thai Visa Centre directly via LINE at @ThaiVisaCentre or Email them.
- Explore recent discussions by using the Non-O Retirement Visa tag in the search box at the top of the page.
- Join the Thai Visa Advice Facebook Group to ask your questions, and get advice from others.