Premiere Elements 2020 Blu-Ray

If you like the Premiere Elements workflow, you will need to find a copy of an earlier version.  I think 15 was the last that did Blu-Ray.   Adobe won't provide it.  You might look on e-bay.

I have no personal experience with other Blu-Ray tools but take a look at DVD Architect from Magix.  Imgburn is free and may work.  PowerDirector from Cyberlink and the Vegas products from Magix may also work.  

DVD Architect was originally coded by Sony when Sony was heavily invested in Blu-Ray.  Sony sold DVD Architect to Magix with all the Vegas products a few years ago.  DVD Architect may be the best Blu-Ray burning software that will ever exist in a world moving past disc distribution to streaming, YouTube, etc. 

As a only a user of Adobe products I can only guess.  It appears that Blu-Ray required working relationships with other companies over codec, licensing, etc.  Those relationships apparently broke down and Adobe abandon Blu-Ray production in all their products.   

I used to burn Blu-Rays, but found out most of my family member audience preferred YouTube and Vimeo distribution because their phones, tablets and laptops wouldn't play Blu-Ray!  Then my Blu-Ray burner lost it's driver in a Windows update.  I gave up and moved on.