What are some ways to copy and paste more efficiently on iOS?
Are you using iPhone or iPad?

If you are using iPad, you should be able to do that. The iOS (or now called iPadOS) in iPad allows you to run 2 apps side by side at the same time. You can copy and paste the info between those 2 apps easily. 

If you are using iPhone / iPod Touch, seems no workaround other than copy and paste the link one by one like what you are doing it now.

https://www.apple.com/ipados/
https://www.macrumors.com/guide/ipados-tips-and-tricks/

Update: Maybe you can try this method? https://www.matthewcassinelli.com/ios-clipboard-shortcuts-copied/