How to get chart screenshots in a post-Capability-API world?

[mountaindude]

I am successfully using the Capability API's exportImg function (and here) to get a PNG image file for certain charts/sheet objects.

But... exportImg is part of the Capability API, which has not been updated since 2018 (!)
Nebula.js is more recent, qlik-embed even more so.
But neither have that nice exportImg() function (or some equivalent) as far as I understand.

My question is simply:
What is the current best-practice if I want to get a PNG of an chart object?

Looking at the QSEoW and Qlik Sense Cloud clients, they do it in different ways:

• QSEoW: Call "https://qliksense.mycompany.net/printing/export/object/image?requestId=b282fca0-6e5e-4542-bf2d-f53a7... or something similar with a big, big JSON body in the POST call, then downloading the image from the URL returned from the server
• Cloud: Do a POST to "https://tenantname.region.qlikcloud.com/api/v1/reports", followed by some polling/waiting

I could do something similar to the above, but a pre-baked library that wrap this is of course nice..
Does that exist?