That's a wonderful idea! While this option isn't available in QuickBooks Online (QBO) yet, you can follow the steps shared by my colleague above to reprint the incorrectly printed checks as a workaround.
I'll pass along your suggestion to our Product Developers. They're always looking for ideas to consider on how to improve QBO. In the meantime, I recommend visiting our Blog site. This is where we share recent happenings and future developments, such as updates to newly added features.
Just in case, I'll add these articles for future reference: