Let's say an Inventor is trying to patent a drinking cup/mug.
In July 2018, the Inventor files a Provisional Patent Application, with a claim for "a cylindrical drinking vessel storing consumable liquid".
In June 2019 the Inventor files a Regular Patent Application, with a claim for "a vessel, regardless of shape or size, for storing and/or consuming liquid"
Minus the fact a "drinking vessel", cup, or mug is not patentable subject matter in 2018, would the patent office deny the July 2018 filing date because the claims were broader in the regular than the provisional, or would it say it was supported by the disclosure and thus able to grant the earlier filing date.
Both claims are supported by the disclosure both in the provisional and the regular (e.g. The June 2019 claim is supported by the July 2018 disclosure)
The focus is on the specificity of the claims.