Mostly so, it's got all the limitations of Manifest V3 which prevents it from doing a good bit of blocking, https://ublockorigin.com/#manifest-v3-section

In particular:

* Cannot use all filter lists simultaneously (rule limits apply)

* No cosmetic filtering in the default mode

* No scriptlet injection by default

* Limited dynamic filtering capabilities

* Requires broader host permissions upfront

But it's definitely still better than no adblockers

FYI uBlock Origin Lite on iOS is inferior to AdGuard and (I think) Wipr as it's just a WebExtension, so it'll only block ads within Safari itself.

AdGuard and Wipr use both the Web Extension and Content Blocker APIs, so they'll block ads in all web views system wide on top of within Safari itself.

However as far as trustworthiness goes, uBlock is (imo) #1.

Also, if you use Orion Browser, they did implement the full Manifest v2 extension spec on top of WebKit, which lets you use full uBlock origin directly.

This is not a true uBlock Origin. It's a best effort attempt at converting UBO rules to Apple's declarative blocking framework, but is nowhere near as capable as actual UBO.