Your headline figure is what you offer for that price. An option is offered, not sold. If YourCA added it in, the builder would get a number you never quoted.
The option is still on the document, under Options with its own figure. The builder can see exactly what it would cost or save.
When you accept the option, the line gets a date. From then on it counts in the total like any other line.
If the builder accepts it after the job is awarded, YourCA adds a line to the job contract value schedule instead. By then the quote itself is closed history.
A job you already wrapped up still accepts it. Builders often take up an option while the crew packs up, so the Quote tab stays open at the end of the job, with Financials and Handover.
A job that has FINISHED is a record and refuses it. The refusal tells you how to put the job back on site.
If options are open, What this quote comes to shows a second figure: the total if the builder takes every option. It is a separate line, and it never changes the total above it. The exported document says the same under the options list.