Near the beginning of the Covid-19 pandemic, several banks stopped offering HELOCs. This was due to what they typically noted as “unpredictable market conditions”.
This is a fairly common precedent, and many banks also scaled back on HELOCs following the financial crisis of 2008.
However, there are still plenty of banks and lenders that do offer them, so it shouldn’t be too difficult to find one that works for you.