iwo835
There's only a few reasons why a book doesn't support powerstones/voting.
1) New book. You need to reach like 5 or 8k words for the staff to vet your book, this process usually happens 3 to 5 days after reaching that word count with holidays and weekends extending the time since staff have those off.
2) Inclusion of prohibited characters. The script behind webnovel automatically black lists any books that are not contracted and try to make use of unique characters. Chinese, Japanese and Korean language are often the prime culprits but certain emoji combinations and ascii formatting will also trigger the script. The former because this is a book format... including smiley faces and what not is just stupid. The latter people attempt to force bold and italics into their story not realizing text formatting is restricted to contracted authors... and isn't even viewable on the app.
If neither reason "applies" you should be contacting webnovel support and enquire if your book has been blacklisted, and for what reason(s). Ask exactly that as being unable to be voted for is blacklisting regardless of cause. The staff will help whitelist your work.