No, making an offer does not automatically mean you’re in negotiations.
Negotiations only begin when the seller responds with a counteroffer or explicitly indicates they are entering into discussions with you. Until then, even if the selling agent says they’ll present your offer to the seller, you’re not officially negotiating yet.
Whether or not the seller chooses to engage with your offer may depend on factors like competing interest from other buyers and your financial position. That’s why it’s crucial for your buying agent to act decisively and make clear that you’re a serious and qualified buyer.