In theory, you should be able to update to 4.89 Evilnat CFW, disable syscalls with Cobra Toolbox and download the DLC with no issues. Then you should be able to enable QA flag and reinstall 4.84 Rebug.
I would wait for someone that is normally active in the PS3 section to reply though. I have...
You can use EdiZon's Tesla overlay to enable cheats while in game. I have this setup and working on my Switch running 10.2.0 and AMS 15.0 w/ signature patches. Here's the links you'll need.
https://gbatemp.net/threads/tesla-the-nintendo-switch-overlay-menu.557362/...
You could always look at the Pocophone F1. It has the same specs as the Pixel 3. Here's a link https://www.amazon.com/Xiaomi-Pocophone-Factory-Unlocked-Smartphone/dp/B07GZ4QJTS
Still haven't received my order. I know I posted here earlier, but it's been 12 days now. This site really is a joke. And yes, I have been emailing them with no response at all. I sent my final email today to have the order cancelled.
According to the FAQ posted here, it will work on all firmwares. So you should be able to update now and not have to worry about compatibility.
Sauce
EDIT: @James310 has a better solution tbh. I'd say follow what he says! You can use this program to format to fat32 on your mSD
I feel like school, back when I was actually in school, was more entertaining though, because of how much I get to interact with people, hang out with friends, and other stuff like that. All I get to talk to at work is my boring coworkers lol