Yes BF, the single port ONT is the weapon of choice now.
Provisioning of two services to a four port is, in my experience, extremely rare. The systems are just not geared up to do it.
If you have a connectorised install, then that’s a single fibre only, as it goes to one specified port on the CBT.
The other posters suggesting they would ask for two fibres to be pulled in are, I suspect, going to get a polite no.
Whether the Openreach bod has a four port in their van ... luck of the draw really.
The ‘fresh meat’ being skilled up at present are shown and kitted out for connectorised and nothing else, no splicer, nuttin’. Punters want it cheap, there’s an easy cost saving, less training, £2500 an engineer saved for not carrying one.