I was curious about where it is aired in different areas, and found out some facts. In 7 of the top 10 largest markets, it is aired on ABC. (This comes from Matt Carberry and was published in Aug or Sept of 2019.)
ABC 52 stations (24.8%) has 41.6% of the viewers
NBC 70 stations (33.3%) has 24.7%
CBS 71 stations (33.8%) has 22.4%
FOX 12 stations (5.7%) has 6.1%
IND stations make up 3 (1.4%) and have 5%