On Commons we use tags to see SDC edits. In the API this field is 'tags', see it for example at https://commons.wikimedia.org/w/api.php?action=help&recursivesubmodules=1#wbsetclaim
Add support for that in pywikibot
Example in pywikibot/site/_datasite.py
def addClaim(self,
entity: pywikibot.page.WikibaseEntity,
claim: pywikibot.page.Claim,
bot: bool = True,
summary: str | None = None,
tags: str | None = None ) -> None:params = {'action': 'wbsetclaim',
'claim': json.dumps(claim.toJSON()),
'baserevid': entity.latest_revision_id,
'summary': summary,
'token': self.tokens['csrf'],
'bot': bot,
'tags': tags,
}