In my humble opinion, the true nonsense is you, knowing 6 weeks in advance that you won't be able to travel back because of covid (which is the very purpose of the 60-day extension).
I'm not wrong. The OP asked if the Thai could apply for his visa in India or Turkey and you replied that he can apply at any embassy of a Schengen country. To what I said that this was not correct, you can apply only from a Schengen embassy located where you are resident, in that case Bangkok, not any Schengen embassy around the world.
Ok, I see the confusion. When I wrote "from a country" I meant "from a place where you aren't resident", and you understood "from the representative of the country" 😉
You can't. If you are resident in Thailand, you can't request a Schengen visa at an embassy located in the USA, Malaysia, Japan, or whatever country. Only in Bangkok.