For a time 107.3 had the WBZU calls (awfully close to WBZ!) but that was strictly temporary:
Wikipedia entry for WKVB:
>>Upon the takeover, Entercom "
parked" the WAAF call sign on
a station in Scranton, Pennsylvania; that station's previous WBZU calls were transferred to WAAF in a temporary move, effective February 26, 2020. The WBZU call letters had themselves been parked in Scranton 15 years earlier... Entercom then changed the station's call sign to WKVB on March 6; EMF had previously used the WKVB call sign on
the K-Love station at
Port Matilda, Pennsylvania. EMF's purchase of WKVB was completed on April 21, 2020.
So if you're in Scranton-Wilkes-Barre you can enjoy WAAF and WODS...as long as you like the news talk of "WILK NewsRadio"
>>
WAAF (AM), a radio station (910 AM) licensed to Scranton, Pennsylvania, United States
>>
WODS (AM), a radio station (1300 AM) licensed to serve West Hazleton, Pennsylvania, United States
WODS is one of four simulcast radio stations in Northeast Pennsylvania that call themselves WILK Newsradio, along with 103.1 WILK-FM in Avoca, 980 WILK in Wilkes-Barre and 910 WAAF in Scranton
Call letters don't matter...so yeah, iHeart go ahead and change WRKO and WBZ AM to WHZY and WZPM...

Nobody will notice

(though different companies are using the WBZ calls on -FM and -TV(