It says that I don't have any groups added that I can share it to even though I am a member of both groups I want to share to.
It's been almost 2 months, so I hope you already got this resolved, but if not, my hunch is that the groups you're a part of don't allow members to share content with the group.
サインインしたメンバーは投稿、更新のフォローなどができます。初めてですか?無料アカウントを登録してください。
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.