Speaking of the wait, I've been wondering something - would you happen to know why the tank releases in Japan for this seem so behind? Volume 4 was only released in Japan back in April, but digitally we're up to volume 7. I've been trying to buy the physical volumes to support the series, but it seems so strange to have such a big gulf between them.
I'm not sure, unfortunately.
I think you can spend some Ganma in-app currency on the next chapter which is unreleased, kinda like with webtoon. Maybe that's a way to support them, if there are no tankoubons to buy. Just don't look at them and spoil yourself :P