Reply-To not respecting Sender Profile when Reply Mail Management is active

Hello,

We manage a Marketing Cloud Business Unit that sends emails for multiple brands. We created a new Sender Profile for one of them (Brand B) with:

• From Name: Brand B
• From Email: contact@brandb.com
• Reply Name: Brand B
• Reply Email: contact@brandb.com

This Sender Profile is correctly assigned to the Send Classification and to the Email Activity in the corresponding Journey.

When sending a real test through the Journey, the From address correctly shows as Brand B, but the Reply-To address in the received email still shows the Reply Mail Management address configured at the account level (reply@mkt.brandaparent.com), instead of the Reply Email defined in the Sender Profile.

Questions:

1. When Reply Mail Management is active at the account level, does it take priority over the Reply Email defined in an individual Sender Profile?
2. If so, is there any way for a specific Sender Profile to use its own Reply-To address without needing to purchase an additional Private Domain?
3. If this is not possible without a Private Domain, could you please confirm so we can document it internally?

Thank you.