I have several large feature layers (about 5,000 parcels in each) with attachments and related tables in some, but not all. I have realized that it has gotten the the point where I can't export my data as a File Geodatabase anymore in AGOL. It will just show a loading screen and default back to the screen with the original selection (shown below) and does not create anything from this data.

I have done some research and noticed this was a problem in 2018, I was hoping it would be solved by now and that I was experiencing a different issue. As we continue to locate more assets without having backup files saved in AGOL, there comes a bigger risk with losing significant amounts of data if something were to happen.
Here is that article I found: https://support.esri.com/en/technical-article/000015786
The only issue with this method is that it does not preserve everything within the feature layer and is more time consuming to go through.
Thanks for your help!