I can't get rid of it, it's obnoxious. I've tried filtering the element with my adblocker but it keeps reappearing. As much as I find Reddit useful (unfortunately), especially for information and discussion relating to my country, I will never install their proprietary garbage app on my phone just to use their website.
Oh well. I've used the Internet before Reddit existed, I'm sure I can get used to doing so again.
As much as I hate GPTs and Reddit I've found that using most of the Search GPTs out there are a better source for getting answers from Reddit. The neat thing is all the AI companies have literally downloaded all of Reddit and now there is practically no need to ever visit Reddit anymore.