That code point is U+0D9E SINHALA LETTER KANTAJA NAASIKYAYA. It’s a letter in a writing system used in Sri Lanka.

Well, the good news is that according to this list, your instance already blocks Threads.

25 isn’t too young, and makes sense if you have focused on education and career. I followed a similar path in that I spent a lot of time in education, only starting to properly consider courting someone around the age of 25 or 26 after I finished my PhD. Things were complicated somewhat by Covid, but I got married last year at the age of 30.

As to losing weight, I can’t speak much from experience on that, but losing some weight may be a good idea, as much for your own health as anything else. Unless you are really overweight (in which case it is a medical issue that you should address), I think you shouldn’t worry too much about it in terms of dating.