Hello Sir . . . Auto copier to adjoining. (any image size ) photoshop scripts

You can do this with an Action, or a Script.

Will there be a gap between the images?

Will this always be 2-up horizontal, or will the number of images vary?

Have you searched the forum for similar topics? Here is a script:

https://community.adobe.com/t5/photoshop-ecosystem-discussions/creating-duplicate-images-for-multi-packs-on-online-marketplaces-within-photoshop/m-p/12511723

This Action presumes a flattened or single-layer original:

This Action works with multi-layered files or flattened or single-layer files:

Or you can use Smart Object layers, so that updates to the layered original are automatically reflected in the duplicated layer.

There are many possibilities.