Newly built single-family house approx. 220 sqm, please provide comments on the floor plan

One would think you are one! Whether ES, that doesn’t come from me

I also wondered whether has developed a second personality

Please refrain from these speculations; it even makes me blush a little. Moreover, I can clearly perceive galactic differences in language use; unfortunately, I cannot compensate for my partly rustic family background.

Some thoughts:
EG
- Entrance area is gigantic but in the end it is hardly possible to install a key rack anywhere in a meaningful way
- No guest room but a shower on the ground floor, which requires relatively long walking distances to reach again
- Kitchen huge and with long walking distances, if there really are supposed to be chairs at a counter, no longer spacious
- Dining room very narrow with just over 3m, which means chairs always stand in the walking path
- Reading corner probably can be done like that
- HTR if ironing is also done there and it apparently serves as the only storage space besides the files in the office, relatively little space. Length of the inner wall would be fully occupied with heating, electricity, controlled residential ventilation and washing machine/dryer
- Windows with 1m outside are not really very wide, measure what glass is left there
- TV area with a width of 3.4m and adjacent walking path results in a bottleneck with a larger sofa, the sofa potentially also stands in front of the window

OG
- Gallery gigantic but what happens there, probably nothing except passing through
- Children's bathroom generous in terms of square meters, but due to the T shape and the layout a narrow corridor, the shower a dark corner
- Parents' area looks quite good, window just barely not centered in front of the bed really bothers my symmetry monk, shower also quite dark in the corner, dressing room again has a lot of transit space in the middle
- Both children's rooms facing north is always a discussion point, the children probably spend more time inside than you do in the bright parents' area
- Study again a "storage corridor" with 2m width and not really sensibly furnishable
- The balcony or its purpose is probably limited in both floors and in case of doubt there will be trouble because only one children's room has one

It feels like the house uses space in the wrong places, namely primarily in the form of transit areas. The living-used areas, on the other hand, are always limited in at least one dimension (dining area, TV, children's bathroom...)

here also my thoughts on the thoughts of the OP

as you know, things rarely turn out the way you imagine. Why not plan this property so that you can live in it permanently? Bedroom, dressing room and large bathroom downstairs, other rooms like children's rooms that can later be used as storage space, reading room, or similar, upstairs.
So I would already design the ground floor now like your future bungalow and therefore replace the present staircase with a half-landing staircase.
Considering the available plots, I wouldn't want to deal with the stress of buying land and building a house in 15 years.
Besides, you don't know how you or your wife will be in 15 years. Then you'll be sitting in your 220sqm house.

A floor plan is primarily individually tailored to the preferences and style of its owners.
It wouldn't be mine