apply_filters( 'wpmu_blogs_columns', string[] $sites_columns )
Filters the displayed site columns in Sites list table.
Parameters
- $sites_columns
-  (string[]) An array of displayed site columns. Default 'cb', 'blogname', 'lastupdated', 'registered', 'users'. 
Source
Changelog
| Version | Description | 
|---|---|
| MU (3.0.0) | Introduced. | 
    © 2003–2021 WordPress Foundation
Licensed under the GNU GPLv2+ License.
    https://developer.wordpress.org/reference/hooks/wpmu_blogs_columns