You can edit the upload size by navigating the BuddyBoss dashboard - Settings - Media. Under Photos, Videos, and Documents, you will have an individual option to set Upload Size. By default, your server's maximum upload size is 100 MB.

The upload memory is set on the server end. The server upload limit is managed by the hosting provider. Please do reach out to your hosting provider to increase the file size of your media uploads (Photos, Videos, and Documents).

You can refer to this article to learn more: