I've enabled the PCF (Power Apps Grid) for a data table (say Table Company), which enabled me to use the view embedded (configured as List for Power pages) in a webpage, all other types of fields are editable in grid mode except for the Lookup Fields, I can confirm that I'm able to submit or update records using the insert form or edit form of the Company Table, so it means that I've the access to the lookup table.
Also in the Dynamics 365 settings of the table I've added the Lookup option as shown in the picture, I've also enabled the filter condition as well, even when I disabled it it did not work.
Is there any additional setting/configurations I'm missing ?