Robert Shwartzman (83) and Callum Ilott (90) both have new frequencies listed on the Spotter Guide from NTT IndyCar released this week. All other frequencies remain unchanged. As noted in another blog post, the spotter guide also added backup frequencies for all drivers!
Robert Shwartzman in Car #83 will have a primary frequency of 461.1625 and a backup frequency of 461.3375
Callum Ilott in Car #90 will have a primary frequency of 462.8375 and a backup frequency of 466.1625
As these are both new frequencies, I will not speculate on Digital Squelch Tones at this time, and have left them off of my config files. I will wait for feedback from community regulars as to what they find when scanning.