Making an API Request, using the Discover tool, one of the available parameters is with_release_type.
The values that can be used are from 1 to 6.
See this tip:

It's important to note the order of the release types that are used.
Specifying "2|3" would return the limited theatrical release date as opposed to "3|2" which would return the theatrical date.

Source: https://developers.themoviedb.org/3/discover/movie-discover

If I remember correctly, the numbering follows the order of display in the dropdown list,
when we are going to choose the type of release:
1 Premiere
2 Theatrical (limited)
3 Theatrical
4 Digital
5 Physical
6 TV

So, in your case, I believe the value should be 5.

Physical = Projection Reel, VHS, DVD, Bluray, Pendrive, SD Card and something more when inventing.