As a matter of fact, we can see exactly what this looks like, because I constructed forehead-elucidating images long ago for some reason:
Maybe I'll get around to examining the Sanoba Witch characters someday.
Sekai Project wrote a blog post about the changes they had to make in Baldr Sky.
https://sekaiproject.com/blogs/news/baldr-sky-changes
https://twitter.com/sekaiproject/status/1207520578908741632
The blog post is very thorough in what was changed so you should give it a read.
But here is the TL:DR: About 4% of lines had to be removed, including explicit sex scenes and lines referencing explicit details.
It's sad that GIGA insisted that they could not release a uncut version but here we are. This still doesn't rule out an unofficial uncensor patch. So that chance still remains.
Meaning they probably made a half arsed attempt and got silenced. Like a good old team of boot lickers or wimps they probably didn't dare taking it any further in fear of repercussions.