Hello,
Whether a profile photo will be displayed in your recipients’ inboxes depends on their email client.
If your email address is hosted by something like G Suite, you should log into Gmail and upload your profile photo from within your settings.
On my side, my profile photo is set in my Gmail account level.
When I send a newsletter, my avatar/photo appears next to my name.
Is your profile photo updated in your account?
Maybe you need to wait until you see it.
On the Brevo side, I don’t think we have a parameter for that photo.
It should be set up/managed on the email/inbox account profile.