This is probably wishful thinking on my part, but if they were going to jump to 13 cogs, the 1X only XPLR would have been the time to do it. I've convinced myself of that as I've only had my bike with XPLR since November.
I am curious to see if they do any upgrades soon on Red or Force. It seems SRAM is being specced OEM on a lot of stuff lately; it seems to have better availability than Shimano at least on new bikes. XPLR vs GRX is just one example.