A new feature called Sync columns has been introduced in Google Ads for MCC accounts.
Advertisers can now synchronize their table columns across multiple accounts using this new Sync columns option, saving time in managing settings across accounts.

To use this feature, select one account where the desired columns are configured and apply the same setup to other accounts.
This feature is still rolling out and may not be available in all accounts yet.
This update was discovered by Vivek Gupta.