There are options in some of the other models (new brochures dated 4th October 2022) are online for all the current models.

 

I did wonder if it is to do with extra weight, as iV models are heavier, by about 100-150kg, however the tyres weight rating is 91.   But then I noticed in the technical specs at the end of the brochures that iV models get different tyres.

 

For Octavia,

SE spec get 205/60 R16 92V,

SEL (except iV) get 205/55 R17 91V low rolling resistance

SEL (iV) get 205/55 R17 91V 

vRS (except diesel) get 225/40 R19 93Y sporty

vRS (diesel versions) get 225/40 R19 93Y xl

 

I am guessing the low rolling resistance or sporty tyres are what they have done their emissions cert on, and they do not want to test with different grade of tyre for iV versions.  The iV models have their WLTP results in different column in those technical pages as they use different test method.  Perhaps doing tests for hybrids is lot of extra faff.