I quite agree with JP on this

I've never known a tester who even "looked" for a neutral light

And I've been taking bikes for MOT's for nearly 50 years

IMHO ;
If you can't find neutral without an "idiot light" you shouldn't be on the bike

When I was instructing, I used to cover up the dash lamps & make my pupils find neutral without a light to look at

Two reasons for this ploy :
1... To be able to find neutral even if the bulb has failed
2... Sometimes the switch can be out of adjustment and give a false indication
Not knowing whether the bike is in neutral or not, is potentially extremely dangerous

Particularly if stood for any length of time at road junctions or traffic lights

Where it is always advisable to select neutral, to save unnecessary wear & tear on the clutch & undue strain on the clutch cable ( where one is used ) & operating mechanism

I never had any complaints from my pupils about this, in fact the majority thanked me