Working in HDR is extremely problematic still. It is totally the Wild Wild West.
First, most screens don't handle it correctly if at all.
Second, it takes a lot of understanding to make sure that your setup is handling things correctly so that those few people that do have useful HDR screens ... see good things.
Are you a very experienced person, savvy with color spaces, dynamic ranges, and all the arcana of those things? If not ... I don't recommend working in HDR. And if you were, you wouldn't be asking this now, would you?
Your best bet, both for actually putting out good clean media, is to stick working in SDR/Rec.709. Set the camera back to non-HDR settings on that phone.
And for the media you've already captured, forget that LUT (which isn't of any real use in any intended workflow!) ... and use the Over-ride-To option set to Rec.709.
Now set your sequence color management to Rec.709, and use standard export presets. Then ... you can work without spending the next couple months and probably another couple thousand bucks to get hardware that can do HDR reliably.
But if you do want to keep playing in HDR ... lose that LUT.
That clip is HLG ... and Premiere can handle it decently. Simply use an HLG sequence color management, and use an export preset that includes HLG in the preset name.
You need to know how to use the scopes in HDR mode, and have a monitor that really truely works in HDR, in HLG, and have your OS set to work in HDR also. The stuff that does ain't cheap, by the by.
Neil