here are the only rules relevant lemmy.world I could find (from mastadon.world):
“Regarding Spam: We are not your free advertising platform. If you are here only to sell your products or services, you will be removed. Occasional posts of commercial links are OK, but when the vast majority of a user’s posts are commercial in nature, we regard the account as a Spam account. Moderators will evaluate reports of Spam on a case by case basis.”
so it seems just do it in a restrained way and don’t let it be the majority of your content and it should be ok?