I swear, QB/Intuit support won't answer the real question because they are backpedaling so hard right now.  You can bandage this all you want QB Support, but the fact of the matter is this.  Microsoft is officially casting off it's Internet Explorer browser.  The only thing left will be the API, which Microsoft Edge is already programmed to take control of.

Microsoft is completely killing IE as a software, and removing it from Operating systems through  Windows Update, staring June 15th, 2022.  This means you have about 7 months to get your proverbial stuff together and use the CERTIFIED API and stop using the browser functions within your software.  MS announced IE11's demise all the way back in 2010.  You've had 12 years (  TWELVE  ) to get this figured out.  Do I sound Condescending?  Upset?  Maybe a little...  Perturbed?   You bet your sweet behind I do.  I've been supporting this poor excuse for software for the better part of 3 decades.  Every single release?  Same stupid idiotic problems.  What's it mostly have to deal with?  You guessed it, the IE API and the vast systemic problems that it brings with it.

But I guess this too will go right under the noses of QB support, and cast off as easily as any other comment thread.  We'll just sweep it under the rug with all of the IE API issues.
Lifecycle FAQ - Internet Explorer and Microsoft Edge | Microsoft Docs