Reports say that having Harvestcraft installed will stop the player from placing foodstuffs. Other items work as expect.

I didn't try this yet. Need further testing to confirm bug.

https://minecraft.curseforge.com/projects/placeable-items?comment=127

Investigation needed - if anyone out there feels like checking if this is still an issue with 1.16+

The problem here is that harvestcraft changes the registryname of all those unplaceable foods & fruits different from what I theorized before. I don't know how to code it yet but I think as what I remembered, checking the mod if it is loaded and just condition the init part of the block registry.

Here is a comment that was posted by freshavocado59 here https://minecraft.curseforge.com/projects/placeable-items?comment=211

FOR PEOPLE WHO WANT THIS MOD TO WORK WHILE HAVING PAMS HARVESTCRAFT BUT YOU CANT FIND THE CONFIG FILE!
you go to %appdata%\.Minecraft\ then go to config and find harvestcraft and open with the notebook, then keep scrolling down till you find

# Makes changes to vanilla food item and drop hunger restore and saturation values to be balanced with HarvestCraft food. [default: true]
B:enablevanillafoodBalance=true

then type false instead for the placable items mod to work

Same problem here