I think it will be very useful to show both types, especially on the mobile version, so that the client can get an idea of where he is in the category.

Now that load more is set, when the customer enters a product, views it and exits, they cannot go back to buy a previously viewed product.

It can go back pages with just the back button, but usually doesn't know where to go.

Therefore, I suggest to visualize both types of "pagination and load more"

Another user approach is like openkart's Jornal theme has added a back button at the top of the product categories.

Otherwise, theme is number 1

Greetings.