I think it's normal at the end of the year they send bitcoins to other exchanges because in order to maintain bitcoin holdings because of the trading stop at the end of December which was carried out in China.
Because every exchange, of course, has its own sales rules, so they make a good decision.
When the price of bitcoin is collapsing, many people think about negative things but believe that, God willing, bitcoin will again give a hijoe sign.
To make it clear. They deposit their bitcoin to the exchange because of the incoming ban in their country? That might be one of the reason but why would they do that in the exchange and not on a wallet? They did not know that the exchange update its list of restricted countries if they saw the banning on the news or if someone from that country message them.
Last year the price of bitcoin is high and people are selling their coins. That can be one of the reason why there are more bitcoins deposits from an exchange. By this year we do not know if the countries that bans crypto will re allow crypto again but that could trigger a price gain and bitcoin balance on the exchanges can grow again.