Still not knowing the specific libray, It looks like as "driver" directory isn't part of the DShot-rmt library structure, so obviously the path "driver/rmt_rx.h" fails.
I don't know if it's kinda problem of both libraries and/or the way they've been installed, but even the enclosed example has the same #include of your sketch and it should work (not in your environment).
Anyway, I see the "DShotRMT.h" file includes those paths:
#include <driver/gpio.h>
#include <driver/rmt_tx.h>
#include <driver/rmt_rx.h>
#include <driver/rmt_types.h>
They seem to be part of that other "rmtNEO" library, so perhaps something went wrong with the installation or configuration, I don't know.
I think you should first double check the libraries you installed (are there others to do the same? Or newer versions? Do they need to be installed separately or using a specific procedure?). Then, if everything fails, contact the library author.