Thanks Danhiel for the additional confidence! I was able to purchase a point to point ticket on SBB from Domodossola to final destination after a few tries on the web and mobile, but it looks like an open ticket for the route, without the specific train number at 9:40am I was booking. The notes on (SBB) availability this afternoon caused some alarm that the construction was still ongoing, "Limited service Brig - Domodossola
Duration:30.08.2024 - 08.09.2024. Lines RE1, RE2 are affected."
Hate to be so cautious, but we had a bad experience last year on an international, interline, ticket between Italy-Austria-Switzerland. I’m usuallly extremely comfortable on Swiss Rail, but TrenItalia does not list the EC 9:40AM departure, which gave us pause. We will head up to Dom with a printed and online QR code from SBB for the route tomorrow and chances are it will all work out! Again, thanks Danhiel.