If someone’s going to hire you remote shouldn’t you demonstrate your ability to communicate well in text and elaborate on what makes you a good choice in a well written, directed cover letter?
Cover letters are a waste, and rightfully ignored.
And they contradict each other, constantly. This is what the difference in culture between companies is.
We can't even globally define what a resume/CV is.
Call it what you will a cover message or note perhaps.
YMMV