Only popular members of TikTok and other online communities receive verification badges. Because Charli D'Amelio is well-known outside of TikTok and has even received media attention, she has account verification to discourage others from impersonating her.
Since the verification requirements have changed multiple times, users with verified accounts may receive relatively few likes.
You can get in touch with TikTok's branding/partner team at "info @ tiktok.com" if your business is popular and seeking a verification badge.