A switch or budget edit is missing

What you're seeing

You expected an on/off switch on a campaign or ad set, or a way to edit a daily budget, and it is not there. Or a budget edit was refused.

Check these in order

1. Your role. Both features are limited to Super Admins. They are not shown to anyone else, and the server refuses requests from other roles even if the page were reached some other way.
2. The client setting. Each feature is off by default for every client. A Super Admin turns on Campaign and ad set on/off switches and Allow daily budget edits from the report on the client's Overview tab.
3. The platform. Switches and budget edits work for Meta and Google campaigns and ad sets. Other platforms show no control.
4. A refused budget edit. One edit may move a daily budget by at most $500 up or down from its current live value, and not below $1.00. Make several edits in a row for a larger move. The message in the dialog shows the allowed range.
5. A failed change. If the ad platform rejects the change, the dialog says so and the attempt is logged. Check the account in the platform itself and try again.

See Status, switches, and budgets for the full rules.

If none of that helps

Contact the team with the client name, the campaign, the time, and the exact message you saw.