Commercial Fixed Wing
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 9
Distraction; Situational Awareness; Workload
ATC Issue All Types; Conflict Airborne Conflict; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Issued Advisory / Alert
Environment - Non Weather Related; Human Factors; Staffing
I was working the Local Control East and West position combined; south operation; landing Runway XXR and Runway YYL; departing Runway XXR and Runway YYR.  Aircraft X checked in on final approach to Runway XXR and was cleared to land. I continued with the duties required of me at the time when the conflict alert alarmed. I processed the information as quickly as I could (overlapping tags); then immediately began to issue traffic while realizing the conflicting aircraft had passed east of my traffic.Keep a SUP/CIC in the Tower not combined with any other position to help scan the movement areas and assist as needed. Although; we are working half the traffic that we are accustomed to; complexity is added due to the combining of positions; runway; and taxiway closures; numerous vehicle calls due to airport construction. Due to the global pandemic we are already working short staffed; so I would not recommend taking a needed body off a crew to accommodate leave on another shift.
Tower Controller reported an airborne conflict between an IFR arrival and a VFR aircraft while working combined Local positions.