I cannot comment on QHY, but only on ASI ZWO 130mm.
This camera just makes troubles on Linux, and no ASI SDK or firmware update so far solves it.
So in other words, one has to buy a new (guiding) camera or hope that it will somehow run
with the 8-Bit hack. I finally gave up, and bought a Starlight Xpress and do not regret that at all (although
more expensive than ASI ZWO).

Please also check some older GIT commits such as:

commit 47227c00a6accb102561cd68c7211d668905f035
Author: Jasem Mutlaq <This email address is being protected from spambots. You need JavaScript enabled to view it.>
Date: Thu Apr 15 17:53:28 2021 +0300

Revert ASICAM camera SDK to 1.16 due to bugs and crashes

or

commit 247f92c9795dc7634670e447027804f76f655dd8
Author: Jarno Paananen <This email address is being protected from spambots. You need JavaScript enabled to view it.>
Date: Tue May 18 12:14:25 2021 +0300

Updates to ZWO SDKs (#403)

ASI Camera SDK 1.18
EAF SDK 1.4
EFW SDK 1.7

Unfortunately changelogs are just "Fix some bugs"

From my experience I would rather buy a slightly more expensive but very well supported camera,
such as Moravian Instruments or Starlight Xpress, rather than a ZWO, due to bugs in SDK.
I also have good experience with ATIK, no problems in several years and updates.

But please keep in mind, this is my biased opinion.

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