Elements 2023 ACR

Hi,
I have just purchased 2023
I have heard that the ACR 14.4 has been vastly improved over the version in 2018.
I have not found much difference except

• I find the histogram in 2018 was much easier to read, the colours are solid and the effects of edits are easily seen.
• in 2018 the size of the clipping warnings indicate when the they are activated, this is not present in 2023.
• The Auto option in 2023 works well in setting a better start point for ACR editing.
• I was hoping that masks or selections would be introduced into ACR.

I was under the impression that 14.4 had all the attributes of ACR in Photoshop. I can't do the comparison because I don't know what is in Photoshop, but there seems little difference between 2018 and 2023. 

I have searched the web, but can find nothing to give me a greater appreciation of the changes.
Can anyone recommend a link to a site which looks at the upgrades in a bit more depth?

I still have the problem of not being able to re-activate my Elements 2018, despite a trip to adobe help.
The Adobe register of my products lists serial Numbers for 2010, 2013 & 2015, all of which I have..
It then includes 2016 and 2021, which I don't have. No Serial Number for 2018, which I do have and now need.  
I don't seem to be able to get past this hurdle.