Because syndication is functionally dead in most meaningful contexts and the bean counters know it.
Between broadcast and streaming, fewer and fewer people are producing anything for syndication, which has not had a single bona fide hit since Steve Harvey took over Feud. Thirteen years ago. The "best" new shows have been middling to low, and most new syndie programs have been abysmal in the books in most markets.
In an era where most high profile TV viewing is "event" based (new streaming drop, the weekly Thursday-Friday rush to watch whatever Star Trek is doing on Paramount+, live sports, etc etc), syndication is in the worst possible positioning.
If you say "watch this 8pm where you live, or next day on [streamer]", okay fine. The sports game that's at 7pm ET, so that's 4 out west? Fantastic, just tell me where. But viewers (ESPECIALLY viewers under 50) have collectively decided that outside of a half dozen remaining legacy shows, "watch at 7pm on the CW in Seattle, 4:30pm on FOX in Chicago, if you're in Nashville it's a 10:30am on NBC, and if you miss it at that one random time, screw you forever (and oh hey, 10 minutes of unskippable ads per hour on a service you have to pay for because only 10% of local TV viewers watch via antenna)" is an absolute non-starter. And production companies know there's no money in it AND stations can recognize there's probably not going to be viewers in it - except for when there's dealings going on with O&Os or secondary revenue streams streams (Drew Barrymore for example struggles on traditional TV but does a TON on social and streaming).
FOX still does a little bit as they're both a production house, have the largest network of O&Os, don't have a non-news cable arm anymore, and are FAR less invested in streaming than ABC/CBS/NBC's parent companies, and have more time to fill and affiliates more accustomed to filling it. But even those aren't lighting the books up even remotely.