What else did you do besides regenerating thumbnails? Why are the images on the site in staging mode so terrible? Could you please check the two URLs I provided in the private field and compare their image quality? Whatever you did, the images are in terrible shape.
I have set the thumbnails as 150 and regenerated them, as a result, images thumbnails started to be blurry on the shop page because you have a gallery enabled there, so I removed the 150 value, regenerated them again and now the images look well and all persist. You can recheck it
In conclusion, the reason for opening this ticket has been drawn out excessively due to the lengthy correspondence. All the information has become muddled. After all the discussions regarding the reason for opening the ticket, what steps do we need to take?
Leave this https://prnt.sc/WW5md8ZS5X5l filed as empty, resave Theme Settings and then go to Tools -> Regenerate thumbnails and regenerate all images. Then it should work as now on the test website.
.
