Hello Elise,

Thank you for your message.
Unfortunately, It seems as if, my previous message has been overlooked, a bit.
The last query also gets skipped somehow.

The carousel is not working as intended and so the image thumbnails.
Irrespective of image size or ratio , the carousel should show up the till the last images.
Atleast after clicking the Down-Up arrow keys. Should not it keep showing further images.
I mean, what is the point in not displaying till last images.

Infact, the last image is not visible and coming up, even after manually dragging the image (click-hold and dragging to up) through mouse.
(and both can be seen and replicated from Video that I shared earlier)

Regarding Thumbnails on Single Product:
Can you please check below again-

Most importantly, this is the default behaviour to show either square images or images of same height, even if they are of different size ratios . And the same can be replicated from the Default Twenty twenty-one theme.

I switched to 21-21 theme, and the thumbnails are showing of equal size in square shape.
Please check below video-
https://bit.ly/3E3JkPZ

Further to that, I had already tried that by setting the width to 150 px from the link you shared. (before even receiving your response)
And then also used Regenerate thumbnails plugin to, but it is still not working. Those did not shows-up in square size or same height.

Can you please try at your end also (I had already shared credentials earlier) by setting thumbnail size and using Regenerate thumbnails.

PS: I think, as this option has been added within Theme itself (this – https://prnt.sc/20y4uzb ), probably, some coding has been Set, due to which height of thumbnails might be getting adjusted automatically, rather than forced cropping in square size.
Can you please ask the Dev Team to check the Code for this option. In case, if it is like that.
And have it resolved in next update.

New:
Can you please resolve my query, mentioned at the end of my previous response.

Regards