Note that there's no iPad version of Adobe Premiere or even Apple's Final Cut Pro -- they're harder to code for a limited device like iPad than you might think.
Not true, Premiere Rush has been on iPad since 2018, then there's iMovie which despite being a very basic consumer app does count considering its project files are transferrable to FCP. Yes these are very stripped down versions of desktop apps, but then so would a cut page only version of Resolve be. Also apps like Lumafusion have proved it's possible to have a more fully featured NLE on iPadOS.
An iPad being limited might have been true years ago, but for some time they've been capable of connecting to external storage and displaying on secondary monitors along with Keyboard, mouse and trackpad support. Most importantly Macs and iPads share the same chipset so the issue of coding isn't as much of a road block as it was before. A current iPad Pro is an incredibly powerful machine with a great display.
I can see how an iPad app could be useful for on the go use, smaller content creators or as an entry point for students new to editing.
The shift towards cloud based workflows means we should be open to the idea of moving Resolve beyond more traditional platforms.
So yes a desktop may be the best option, but we don't all have the luxury of the best option at all times.