Hi erik ,
Please, read this article: https://stockmanagementlabs.crunch.help/tips-and-tricks/how-to-change-the-characters-number-in-the-product-name-column
The only difference is that in this case you must use the hook 'atum/inbound_stock_list/column_title_length' instead of 'atum/list_table/column_title_length'
Best Regards,
José Andrés.
P.S. Please, understand that custom code is out of the scope of this forum. If you aren't able to get what you want with the info in this post, you should hire a freelance developer to help you.