It seems that you don’t know that you can support your own request by voting for it?
This is a way to show the developers how much a feature is wanted by the user-base. This does not explicitly mean that the feature request which cast the most votes will be implemented, but the chances that such a request gets more attention than a request without or only very few votes is at least higher.
The current roadmap¹ for Krita is unfortunately very full and long, so it probably will need time to see this in Krita, but that does also mean, there is more time to cast more votes, if you want to look on the positive side of things. Also, there is more time to collect ideas and refine the request. So better a request with a long waiting time and a small chance, than a request never made, because a request not made will most probably never be seen in Krita.
Michelist
¹ Here you can read about Krita’s perspective as seen from those who make it:
I voted this up as I’m doing a manga series and the first tankoubon was going to be huge, and so I had to split it into three parts and one split has 200+ pages, which would reach 300 once finalized with 13 chapters… Need this functionality in the comics manager…