Unfortunately, your question is not entirely clear to me. For questions regarding your order, our customer service can also assist you:
https://helpcenter.digitec.ch/hc/en-us/requests/new
According to the instructions for use, this product is compatible with the following models:
Managed Gigabit Switch
TL-SL3428
Gigabit Web Smart Switch
TL-SL2210WEB
TL-SL2218WEB
TL-SL2428WEB
TL-SL2452WEB
Gigabit Media Converter
MC220L
Of course. The TL-SM321B can be compatible with MC220L. But the TL-SM321B must work with the TL-SM321A as a set. One is to send the signal, the other to receive it. :)
Your questions can all be answered with YES. Fits.
The whole thing is also available as a bundle at Digitec: Fiber7 hardware bundle (3m fibre optic cable)
I have been using the TL-SM321B in an MC220L with an Init7/Fiber7 glass subscription for almost 5 years without any problems. (this combo was also their standard config proposal or hardware bundle offer) So at least in terms of hardware, the question can be answered with YES... I can't say whether Sunrise has tinkered with any of its own specifications, but I think this is less likely to be the case.
yes, this one is compatible, use it yourself with a Ubiquiti switch. But Ubiquiti also has its own SFP adapters. Ubiquiti UF-SM-1G-S: 2er Set SFP Modul (Transceiver)
TL-SM321B and TL-SM321A are necessary because two different wavelengths are used for RX and TX and this on the same fibre ! I was able to simply switch TL-SM321B to a MICROTIK router (INIT7 - FIBER7 provider).
You'll have to look at the official compatibility list to know what's supported by HP (eg https://support.hpe.com/hpsc/doc/public/display?docId=emr_na-c02593948). That doesn't mean it won't work, just that HP won't guarantee it. Most of the time big vendors would actually block SFPs that are not branded by them, however the practice has slowly stopped. Short of getting it and trying it out there's not much you can do to be certain. Not much evidence of anyone else trying this against an HP switch. It doesn't cost a fortune and you can actually return it for most of the money back.