@KirstenThomson ...
Thanks for clarifying that you got another platform mixed up with Canvas. Even if you were working in Canvas, another option for you would be to first create a sort of "template" assignment page. Then, put all the settings that you want into that "template" assignment ... which may also include the overall look and design of the assignment page itself which has your instructions to students. (Example, maybe you have these sections for the assignment: Overview, Instructions, Submission Requirements, etc.) Then, once you have that "template" configured just how you want, you can make duplicate copies of that assignment "template" page, and it should carry all of those settings over for each copy that you make. Just make sure to change the necessary details in each of your duplicate pages, and you should be "good to go". How do I duplicate an assignment?
I hope this will help in some way. Sing out if you have any other questions about this.