The Korean Upbit has been the one exchanges with some decent HBD liquidity.
Notice the pump in the supply at the end of August and beginning of September 2021. From around 3M up to 18M in around 20 days. A 15M more HBD was transferred to the exchange.
This was basically an effort to pump the price of HBD, but since conversions from HIVE to HBD were already activated at the time, they end up pumping the HBD supply instead of the HBD price, sucking up a lot of HIVE in the process. The max that the HBD price pumped was 1.2$.
Since then the HBD supply is constantly going down on Upbit and it is now almost at the previous levels, with just around 3.7M.