No. The first time you are Constitutionally required to be informed of why you are being arrested is when you are arraigned for the first time.
Yes, detainment is a delay to help eliminate you as a suspect or to bring you back to your senses if you were acting out of control, like you’re drunk or just out of your mind.
https://openstax.org/books/american-government-3e/pages/4-3-the-rights-of-suspects
No... Arraignment is your first court appearance in front of a judge where charges against you are formally pronounced. It can be proceeded by a bond hearing in some states, but most have the bond hearing in the same arraignment hearing.
Until then you are “arrested and being held on suspicion of” a crime pending formal charges brought by the DA which has to happen within 72 hours or they have to release you before the bond/arraignment hearing.
https://www.findlaw.com/criminal/criminal-procedure/arraignment.html