Hi @YuvalKonstanti , good day.
Yes, by default, only the owner (and tenant admins) can edit the Dashboard. You can choose to share the dashboard with anyone with the link, with a group and with a user, and give them the rights to edit or just read the dashboard.
If your team has tenant admin access, they will be able to edit the Dashboard as well. As far I know, there is no way to "lock" a dashboard only to you, despite the admins.