Although your ISP was kind enough to run this fibre for you, the price of 30 meters LC/UPC terminated fibre isn’t terribly excessive (at least here in USA), so would it be possible to use their fibre as a pull-string to run new fibre instead? That would avoid all the adapters, although you’d have to be handy and careful with the pull forces allowed on a fibre.
The problem is the installation of the connectors. They've welded the fiber the SC/APC pigtails, I wouldn't be able to do that.
The big manufacturers (Cisco, HPE/Aruba, etc) will have detailed spec sheets, so you can find the branded one that works for you. And then you can cross-reference that to cheaper, generic, compatible xcvrs.
That would be very very generous of you; in the fiber section I'm pretty ignorant and I'm worried to purchase wrong items 🙈