This isn’t a good idea.
OSCP develop the distributions incorporating tools and are therefore able to develop a curriculum that can gauge ones ability in using these in real environments. The reason OSCP is so recognized because OSCP are the authority because they are the distributors.
Not very useful having a certificate that says you’ve achieved X on HTB or any other site, because they can make up any curriculum and marking scheme they like…?
Go get an OSCP cert if you want a cert lol.