How do you set up a contact on a Motorola Moto G7 Power to dial in with pauses to a conference call?
In most standard dialers you have to type in at least one number or other character before left to the number-to-be-dialed a 3 dots menu appears that has an entry to Add 2-sec pause.

By selecting Add 2-sec pause a comma (,) is appended to the number-to-be-dialed.