I have posted various ways to make wooden balls without a lathe on my homepage.
The homepage is in Japanese, but there are videos so I think you can understand it.
http://noho91.web.fc2.com/page181.html
My video list
https://www.youtube.com/@noho91/videos
My woodworking homepage　（のほほん木工房）
http://noho91.web.fc2.com/