Hi,

Upsells are configured right that’s NOT the problem. ( See image No2 ).

I use Elementor page Builter.
And i use HTML block to create a custom TAB for Upsells with “products ( grid of carusel ) element” ( See image No3 ).
If you see the image No3 the Data source option that i have selected should have to give me Upsells products to any product i connect with the Custom HTML Block .

BUT to problem i say again is when i have 40+ Upsells products connected with a product and i use on “Panigation” option the “Load More Button” ( See image No4 ) they do NOT show up ONLY Upsells products but unrelated products!!

If on “Panigation” option i choose “Inherit” the default option it work fine.