iOS 26 update causing buffer after face recognition on iPhone 16e

I upgraded 2 days ago to iOS26 and it buffers after face recognition. Since I did not encounter this with 18.7th version, I would like to downgrade. Can the Mac center help me with this?

[Re-Titled by Moderator]

Original Title: iOS 26 update caused my unit (16e) to buffer. Will a mac center help me downgrade