I have tried this REST API and I got one item correctly:
https://****.sharepoint.com/sites/test/_api/web/lists/getbytitle('ListData')/items?$filter=ExpiryDate eq '2023-04-25' or ExpiryDate eq '2023-05-11' or ExpiryDate eq '2023-06-10'
But if I type this date I will only get one item although I have more than 300 items which should match this criteria:
https://****.sharepoint.com/sites/test/_api/web/lists/getbytitle('ListData')/items?$filter=ExpiryDate eq '2023-04-25' or ExpiryDate eq '2023-05-11' or ExpiryDate eq '2023-06-07'
So what could be the issue?