How can I partially update a specific variant in Catalog API v3?

Question:
Hi!

How can I partially update a specific variant in Catalog API v3?

Product:

What are you trying to achieve:
I’m trying to update the price of only one variant of a product that has multiple variants.

What have you already tried:
I’ve already tried using the Bulk Update Product Variants By Filter endpoint, but no matter what I do, it always updates the prices of all variants.

Currently, I’m using the PATCH Update Product endpoint, but I have to include the full list of variants to avoid affecting the product data.
What I really need is a way to update the price of a single variant through the API without having to resend all the others.