Is using OCLP considered jailbreaking? Is there an OCLP equivalent for phones?

I would guess that it's not thought of as "jailbreaking" as such. But when we do this to a phone, this is how we call it? Or am I not up to date on the whole updating phones issue... Is there something about iOS that makes it more difficult, or easier for Apple to lock you out of features?

I have updated an old iMac via OCLP and it's great!
So I was wondering...

I have an iPhone 7 I would love to update but am concerned about "jailbreaking" and being locked out of app installs via the app store. What subreddit or app etc should I read up on, if such a thing is possible?

Apologies if not the right sub to ask this, but I figure if y'all are into extending older tech, the people here would know where to direct me.

Author: @TheWebbster