Removing the offending App from your iPad will also have removed all associated data from your iPad. As such, any residual risk should have been removed.
Be aware that there are no true Antivirus Products available for iOS/iPadOS. Those that claim to provide AV protection are little more than “snake oil”, have negligible (if any) efficacy and for Apple devices should generally be avoided. Very often, Apps of this nature introduce more issues than added benefit.
Unlike traditional Operating Systems with which you may be familiar, iOS/iPadOS uses a sandboxed security architecture. As such, Apps cannot access any data outside of their own sandbox - and cannot access the storage and resources of other Apps. As such, it is impossible for an Anti-Virus App to scan the filesystem.