Managing subscriptions can be a pain - thankfully, when it comes to handling them in bulk, we have you covered.
Navigate to "Subscriptions" in your Roadmap application, and then click Product Price Adjustment".
You will then see a list of all of your subscriptions - which you can then bulk select - this includes both products and variants.
When you've select the products you want to edit - click "edit prices". This will present a modal where you can choose to edit the price, or compare at price.
To aid in quick changes, Roadmap can enable admin to increase by, decrease by, or set to, with either a % number, or a $ amount.
Once you have selected your proposed changes, you will see new pricing in purple - along with a "was" price. This prices the admin a chance to review all pricing, before clicking save at the top of the screen to action the changes.