Is there a mechanism for automatically increasing the price if the purchase price rises?

> Is there any mechanism for automatically increasing the price if the purchase price rises? E.g. I have a minimum margin of 25%. If the purchase price in the store rises, the module raises the new price to the minimum margin

Yes. If you attach the created margin task to CRON, prices will be changed according to the schedule for all products whose purchase prices have changed. The module has an option to update store prices only for those whose price has changed.