Small Transport
Air Traffic Control Developmental
Communication Breakdown; Situational Awareness
ATC Issue All Types; Airspace Violation All Types; Deviation / Discrepancy - Procedural Published Material / Policy
Aircraft; Airspace Structure; Human Factors; Procedure
Aircraft X was doing pattern work; I believe for ZZZ1 airport. It was a late pointout from the X area and we were both extremely busy and should have split sectors; but with staffing due to COVID-19 it wasn't possible. Aircraft X ended up going into ZZZ Tower's Delta without any coordination.I should have pointed out the aircraft to ZZZ Tower first and foremost. It would have helped to know Aircraft X was going to do work today. The volume of photo flights absolutely saturated both X and Y areas today; so I have to think that contributed. Overall X and Y sectors should have been split to accommodate the volume and complexity.
TRACON Controller reported an airspace violation occurred due to lack of coordination.  Traffic volume was cited as a contributing factor.