More columns for mobile Shop page

Hello support
Others have already started similar topics, but yet my problem wasn’t solved.

It is as follows:

My shop page, in mobile mode, is displayed with only one column. The items are too big and scrolling down is unappealing for the customer.

I would like to be able to customize it. How can I put 2 columns of items, or maybe 3?

Shop page:
https://lojagelain.com.br/shop/

Thank you in advance