Cable series have the advantage of not being entirely dependent on advertisers for their budgets. Much like FX, AMC, and other basic cable outlets, people have to pay to subscribe to SyFy (not like premium cable of course, it’s in cable bundles and they only get a tiny percentage), so they CAN have higher per-episode budgets than broadcast network shows, largely because they are allowed shorter seasons. You trying to tell me stuff like Taboo and The Terror have smaller per-ep budgets than the CW? Hell no. Broadcast networks are free to their viewers, cable outlets aren’t. That’s why the ratings are typically automatically higher for broadcast networks unless we’re talking a mega-hit on cable like TWD. But that’s also why it matters less - because cable has a 2nd source of funding to make up the difference. Especially as The CW has smaller budgets than any broadcast network, they are the bottom of the barrel.
Now, I can buy that Krypton had a smaller per-SEASON budget than a CW show, since they had less than half the episode count, but not per-episode, unless you can find me a source that says otherwise.