This is probably going to be first unfair olympics in history of olympic games, some countries are banned, ridiculous rules, probably no public and fans, man competing in woman category, and who knows what else are we going to see...
Why are you saying this, is there any news link that there are countries banned from participating in this Olympics, I really don't know about this.
The above user was right with what he/she said because the orgainzer involved in the olympic are scared of the virus than it capacity and if you following this Olympic game closely you will know that it the most restricted tournament in the history of sport ever since the pandemic issue have happened with no prize or ranking point.
This is the reason why Tennis star like Serena Williams, Rafael Nadal, Thiem etc pulled out of the tournament.