Online Logbook - How to access?

I'm in the process of selling my 2014 Octavia and would like to access the online logbook of the car... (This online version replaced the book with dealer stamps in it)

I contacted my current Skoda garage and they sent me only the last 4 years of service/warranty information & said that that was all the information they had.

I've used 3 different Skoda garages in the lifetime if the car.

I cannot add the add the Octavia to the My Skoda app because it says it's not supported by the app.

How can I get a list of all the work performed on the car?

Services I have the invoices, however, I've had several warranty/free work done where they didn't provide any paperwork because Skoda paid for the work? ( TIBs - xenon ballasts, door rubber seals, air bags, water pump)

Shouldn't an approved Skoda dealer be able to give me the full history despite using different garages in the past or do I need to request this from Skoda directly?

Gabbo