Hi again,
in my 8.6 “not released yet” version, I have the 220+ rules.
You’ll have additional rules if you upgrade from 7.9 LTS to 8.5 latest release, and up to 220+ rules in the 8.6 
(Example of these additional 31 rules in 8.2, in comparison with 7.9: 31 new rules for TypeScript)
Your SonarWay profile lists all the rules that were available with 7.9 LTS
(and if you create your own QP, you can activate more rules if you feel the need)
And you can use api/rules/search?language=typescript if you want to export the list of rules that you benefit from and compare with a more recent version when you upgrade.
Carine