Amazon doesnt actually have a native button to just push your current cart to another account, which is honestly a huge oversight for business stuff. Since you have 40 items, your best bet is using the Wish List workaround instead of starting over from scratch.

• Open your cart and select Move to List for each item.
• Name the list something clear like New Office Supplies.
• Go to your lists, set it to Shared, and send her the link.
• She can then hit the Add all to cart button on her end. Its not perfect because you still have to click move to list a bunch of times, but it definitely beats searching for every single SKU again when youre in a rush. Btw, I found Easy Cart Share last week and it's a total lifesaver for organizing group buys with my roommates.

Late to the party but I feel your pain. Doing this manually is a total nightmare especially with 40 items. Over the years I've tried a bunch of workarounds for this exact thing when my team needs me to approve their purchases. Honestly, the easiest way is to use a browser extension. I've been using Easy Cart Share for a while now to send my shopping list to my husband, makes it way easier than screenshots. Basically it lets you generate a link of everything in your cart and then your boss just clicks it and it populates her cart instantly. It saves a ton of time compared to the registry or wish list stuff which can get messy with 40 random items. Just make sure she is logged in on her end before she opens the link and you should be good to go for that opening tomorrow.