As is often the case, the lead negotiator in a trade negotiation works very closely with other government departments that have an interest in the matter, including, in particular, the agriculture department. There are others, as well.
For this purpose, there are a variety of committees and fora in which that collaboration occurs. Indeed, when trade negotiations occur, groups of officials from various parts of the government go and participate. In the ongoing administration of agreements, this is also a shared responsibility. Under CUSMA, the CPTPP or CETA, it will depend on what the subject of the committee is and where the chair is best placed.
The trade office in the Philippines is actually a separate issue. It was a result of the Indo-Pacific strategy that was launched 18 months ago. It's part of the broader effort to deepen our trade relationship in the region and deal with agriculture issues that may arise.