I'm pretty sure that it's a cost thing rather than anything else when pre-recorded shows are captioned live. And I suspect that captioning is entirely possible remotely, so I'm not sure how much benefit of the doubt I'd give them for not working as well during the pandemic.
In the UK, we have statutory requirements on subtitling (aka captioning) with upwards of 80% of programming requiring it. In practice, the big broadcasters do everything. As far as I know, only live programming has live captioning. Everything else is done in advance - and quality is regulated too. (There are also requirements of in-vision signing and audio-description).
But if you look to streamers like Netflix, Amazon or Disney, they make quite a big play on their captioning. It's a key deliverable alongside the programme, since to make their shows work globally, they need multiple audio and captioning options for those viewers. All of that is before all the other benefits beyond simply assisting viewers who are hard of hearing.
So while it might feel like a sometimes unwanted obligation, networks should consider it an opportunity to reach more audiences if they're smart.
Adam