Checked with new HDRP project and the time taken for creating new script has increased:
2020.3 - around 1 sec;
2021.2 - around 3-4 sec;
2022.1 and 2022.2 - around 4-5 sec;
of course on every version the "new HDRP" project means different because it uses different packages... But what is interesting - even in simple new 3D project on 2022.2 creating new script takes around 3 sec.

How can we reproduce it
1 Create new 3D project
2 In Project Browser RightMouseButton->Create->Script

Actual results: that causes import, then Domain Reload, then some other stuff - all that takes around 5 sec