BassimBinYoosaf The gallery as of now doesnāt even have the most basic editing features built into it, so it seems like it is indeed a fairly early development preview rather than a close to finished project. When it comes to things like that, I suggest you use the official feedback form and let the team know what kind of features you are missing.
Open the phoneās settings, search for āfeedbackā and select āFeedback - Systemā, then tap the little āFeedbackā button on the lower right.