I would like to start selling prints so my question is: is it allowed to use Adobe Stock images for it?
I will not sell the images digitally but on pints and canvas.
Compare the license terms for Standard and Extended licenses carefully; it's possible you will find your use case there.
Yes, it is possible with the correct license.
From the Adobe stock website:
Does Adobe Stock offer extended licenses allowing licensees to sell derivative products based on an asset?
Yes. You may purchase an extended license for most Adobe Stock photos, vectors, and illustrations. Extended licenses provide unlimited impressions/print runs, and the ability to create derivative products for resale, such as coffee mugs, t-shirts, etc. Extended licenses may be purchased by clicking the image on the Adobe Stock website and selecting the Extended License tab. If you have already licensed the image, you can click your name in the Adobe Stock navigation bar, open the License History page, scroll to find the desired image, then click License Again.
Look here for more information on licensing: https://community.adobe.com/t5/stock/links-for-licensing-terms/td-p/11366788
(Disclaimer: As always with licensing, this is my interpretation of the rules. I think they are correct and advice is based on reading and interpreting the licence terms and on fair use for both the buyer and the artist/stock company, but I cannot rule out that my interpretation is wrong. I'm not an Adobe employee).