Mentioning another person's work or account on social media usually does not constitute legal copyright infringement, but depending on manners and how the recipient perceives it, it can develop into trouble.
Legal aspects (copyright and rights):
Scope of opinions and introductions: Generally, if the purpose is legitimate (such as opinions or introductions of a work) and the requirements for quotation are met, it is unlikely to be legally problematic (copyright infringement).
If the author themselves has made their account public on SNS with an official account or public settings and accepts opinions and mentions, mentions within the bounds of common sense are permitted as a function.
Manners and operational cautions:
Notification burden: When you mention someone, a notification is sent directly to them, so it can be a burden for people you don't know or authors who do not like receiving a large number of notifications from fans.