This article shared is the only source for this seen by me so far and the claim has not been vetted further.
CoinDesk now has an article with an official source confirming:
According to the agency's announcement, Uzbekistan restricted access to cryptocurrency exchanges and over-the-counter brokers because the country's regulations don't allow citizens to trade crypto on foreign platforms. Under a law from 2018, crypto mining pools, exchanges, custodians and "crypto shops" must be licensed to operate in the country.
reply