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I'm actively dealing now with dual-SIM (SIM+eSIM) settings in Pixel (and it's my 1st dual-sim experience ever).
It's a bit annoying and time consuming process, and I see lots of strange behaviour of eSIM, that established itself in a master role in the system (!), where it's impossible to switch eSIM off (not yet sure if it's not possible the other way than normal in SIM mgt panel), and other weird combinations between eSIM/SIM, SIMs/System, and othe unexplained (to me) behavior.
The systems, in general, often work in a very unexpected manner and the only reasonable way is to tweak and experiment, with different settings, multiple checking, restarts, on/off`s, changing order/sequence, etc. If you understand more or less what you're doing! ;)))
Worked well for me this time too, although I don't see it as a finished thing and am expecting to get issues during the full use of the phone in this configuration. But generally I'm impressed by how GOS manages that chaos :))) 5! *****
You may finally need, as you wrote, to consult something wit the carrier(s), as stated here: https://web.archive.org/web/20240316175213/https://support.google.com/pixelphone/answer/9449293?hl=en#zippy=%2Cstop-using-a-sim-card%2Cturn-off-a-sim-temporarily
GOOD LUCK.
And don't forget to share your findings, wich is usually very helphul for others sooner or later.
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