I have been a loyal Evernote customer/user for years, and have watched on in frustration as this request has not been addressed. It is commented on in numerous online reviews and podcasts, and YouTube shows, but all changes/updates Evernote makes seem to take EN in other directions that don’t help iOS users that would represent an important group. Frustratingly, I recall this feature once was available years ago in EN iOS, but was removed (but stayed available in android and other platforms), and was available in now defunct third party EN apps (Clever note?) which I tried using in desperation.
I think, for me, it is too late. Notion is on the horizon and it has almost all features I want. Including nested features. Their apps are not perfect and that is the reason that I am using Evernote. So hurry up.