I am using a reel gallery, love the large size on desktop but all the images on mobile are cropped and I Have lettering in the images, can I have a custom sized reel for mobile only?

I am currently uploading three different pages, which are step to step guides on using drug testing strips, (We are a peer lead harm reduction organization) I love the size of the gallery and reel on the desktop version of each of these three pages but the mobile version crops the images with important info on them is there a way for me to keep the larger size on desktop version of these three pages but have the whole images in the reel on the mobile version? One is up its under the Xylazine test strip guide. I have 2 other pages being made same layout looking to have the galleries act the same on each. 

You can share link to page where you use reel, we can use some code to fix this on on mobile

https://www.sunar.ca/xylazine-test-strip-guide
https://www.sunar.ca/fentanyl-test-strip-guide
https://www.sunar.ca/benzo-test-strip-guide

https://magenta-chiton-2wab.squarespace.com/config/pages
The first three are the pages I need this done for the mobile version. The other is the editing page as you know, thank you I just started learning code but this needs to be done before the time I will learn to do it myself lol I really appreciate any and all help!

thank you so much for your help! My little non profit that I work for really appreciated it!!