IMPORT CSV FILE TO SEQ

No, that is not possible as far as I know.

Do you want to import a CSV-Marker-File from Reaper?

There is a tool available from a chinese programmer. I can help you with that if you want... You can find it on Youtube as well. But the homepage is in chinese and it will be difficult to download the software because of all the chinese symbols...

Fiets.de has a tool that will turn a CSV file into a sequence.

You can use his timeshow tool but simply create the csv yourself rather than using reaper. Then simply skip the step of importing the time code show and you’ll just have your sequence.