what happened to saving reports as dashlets?
It's working fine on 5.25.0 for me.

EDIT: You must go to Access tab > enable Available for Dashboard > select actions drop down > select Save. (Not view results).

That appears to be the misstep. Clicking View Results does not save the report. There is valid reason for having the save v. view results functionality as there is the permission save report criteria. Sometimes you may want someone to access and modify the report for one time use but not save it for everyone.

Then On CiviCRM Home, you have to click  Configure Your Dashboard and drag it into dashlet area.