To control how many products appear on your store’s archive pages ( Shop, Product category archive, Product tag archive ), you can easily adjust the display settings directly from your WordPress dashboard.
Follow these steps:
Login to WP Admin.
Go to Appearance > Customize.

Scroll down and expand WooCommerce.

Click Archives.

Set the following:

Shop Posts Per Page – Set how many products to show per page.
Shop Columns – Set how many columns of products to show per page.
Click Publish.
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Create Or Modify Archive Templates
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