Can I set my Time Machine to back up at the same time every day?

From the below link

 Back up your Mac with Time Machine

It appears if Automatic Schedule is configured

Excerpt from link above link

" Backup frequency and duration

Time Machine makes hourly backups for the past 24 hours, daily backups for the past month, and weekly backups for all previous months. The oldest backups are deleted when your backup disk is full.

Beginning with macOS Ventura, you can change the backup frequency: Open Time Machine settings, click Options, then choose a setting from the “Back up frequency” menu.

The first backup might take a long time, but you can continue using your Mac while a backup is underway. Time Machine backs up only the files that changed since the previous backup, so future backups will be faster. "

you can go into System Settings > General > Time Machine and select "options"

and then set "Back up frequency" to "Automatically Every Day".

but I am uncertain that the daily backups will happen at the same time every day.

There might be a third-party app that can do that, but the only customization that Apple offers is the frequency of backups.

I have not changed it, but this article indicates it will run at the same time as you set it up.

https://macosx-faq.com/change-time-machine-backup-schedule/

As @Barney-15E suggested to, there is a Third Party Application that does effectively allow making a Clone at a specific Schedule Time

For that purpose, suggest reading more about the Application, what is does and does not do before investing time, $$ and effort for your specific needs.

https://bombich.com/kb/ccc6

https://bombich.com/kb/ccc6/how-set-up-scheduled-backup