Photos and Videos are showing in single folder with same date, after I transferred from android to iPhone

I just switch from android to iPhone. I have transferred all the data via “Move to ios” app. Now in photos app all the 8000+ photos are showing in a single date (on which I transferred). To resolve this issue I deleted all the data and again transferred all the photos and videos via Xender app as a whole folder. But then also it’s same as earlier. Showing all the photos on same date on which I transferred. Videos still not showing in photos app. Although all the photos and videos are in different folder in files app then why not showing in photos app.

I want to sort the photos and videos same as it was on my old android phone, cause finding particular photos in this mess is such a headache.

Please help me to sort it out.

PS : I haven’t wiped out data from old android phone. So I can transfer again if there is any proper solution.