I'm not sure about where you live - every area has different rules. You would have to ask your lawyer (or the court). In many places, if the trustee supports your plan and your creditors have no objections, you don't have to appear at the confirmation hearing, and the court will probably approve your proposal as a matter of course.

If the trustee or a creditor objects, you & your lawyer have to attend. Your lawyer will need try to convince the judge that the objections have no merit or tries to negotiate with your objecting creditors. If the court still upholds the objection, you will probably have the opportunity to file a modified plan & then schedule another confirmation hearing. On a rare occasion the judge may decide that the objection is so serious & that they believe a modified plan would be futile & orders that the case be dismissed.