I'd like to share some files I've uploaded to a cloud (Mega, OneDrive, Google, etc) via torrent so I don't have to leave my PC on 24/7 till there are enough seeds to maintain it.

I know this isn't "directly" possible, but it would be nice to be able to share cloud files via torrent.

Any ideas how I can do this? Maybe an idea for a future update? TIA

this is not possible. "webseed" exists, but it's only for files you can download from a direct link with your browser. no pages in between. These services don't provide this option on purpose.
Paying for your own server or a seedbox is your only option.

You can either use a seedbox (a paid cloud based seeder) or upload those files to other free cloud file hosting services. This way you don't have to worry about your main accounts.