Can a customer see where I am?
No. The On my way link shows how many minutes away you are and when that last updated, never your position. Your location is erased when you arrive or the trip ends.
From the guide Using the Seayora app as a contractor or technician.
On my way
Every job assigned to you has an On my way button on the time clock. Tap it when you set off, and the customer gets a link showing how many minutes away you are. They never see where you are or a map. Tap I have arrived when you get there; you are also marked arrived when you clock in on the job. See “On My Way & Live Arrival Times”.
Read the whole guide: Using the Seayora app as a contractor or technician