Discover Plus

Amongst the channel logos they often show, Science is NOT one of them...

Almost certainly yes. It's just another streaming service like Netflix, CBS All Access, etc... Peacock is free only because it's part of NBC/Universal, just like Comcast.

Science is listed among the channels at discoveryplus.com.

If you are talking about the Discovery+ app, then it makes no difference what platform. All would receive everything at the same time. Some shows that will be exclusive to Discovery+ may never show up on the linear channels, or maybe just air one episode as a teaser.  As for when linear channel program episodes appear on Discovery+ is up to Discovery Networks.

For reference, linear channels means the regular cable channels you tune into.

Remember that HBO is a premium network you pay extra for. It's no surprise HBOMax would be included. Discovery Networks are standard cable and you may not get all of their channels, depending on which package you have.

I did remember that.  In fact, I pointed it out.  I'm just saying that I DO pay for Discovery as part of my cable bill, and I'd hoped that, like HBO, they would make the plus version available to us.  They don't have to.  I don't think HBO has to give us subscribers HBO Max either.  But it makes me like HBO a lot more because they do give it to us.  It makes me like Discovery less because they don't.

I think what a lot of us were hoping is that because we already pay for the Discovery channels in our cable bill, just like many of us pay for HBO in our cable bills, we'd have access to Discovery+ for no additional charge, as it works for HBO Max.   (You can argue semantics all you like, but even if Discovery is on basic cable, part of the basic cable bill goes to pay for Discovery).

I don't see much I want to see on Discovery+, but I would like to watch Battlebots: Bounty Hunter.  It would be nice to have access to that.