Your post originally asked about citing medical issues. When the previous posters commented that your counselors should address those kinds of comments, then you changed your tactics and added, well my letters of recommendation aren’t going to be good because I can’t reach my counselor/ I am the only one applying abroad so they won’t know.
All of this sounds like “my dog ate my homework” excuses. Everyone, and I mean EVERYONE experienced Covid-related detriments; some people got sick.
Many, many thousands of student athletes couldn’t participate in their sports or anything at their schools and communities during Covid.
If you are not one of the top students at your school, and the counselors don’t give you the time of day, and you’re making excuses for your LORs, what does that say about what’s left of your application?
If you’re an international student who hopes to be admitted to a US university, you have to be come across strong in everything. Why should a university admit you when you are faulting the world around you? You’re not presenting yourself in the best light which is what the US universities want.