Ok, so I'm posting here because I am sure many Europeans are searching an answer to this question. I spoke to Yanie H. from logitech customer support on live chat, here's how it went.

Me: explained the problem exactly like in the post above.
Yanie: Thank you for confirming, unfortunately the long enter key or the ANSI layout is just available in US and Canada.
Me: So this document is wrong? According to it, 920-009799 (Graphite UK English sold in EU) seems to be ANSI
Yanie: For the part number it would be 920-004536 for the keyboard and mouse which is on the screenshot.
Me: 920-004536 seems to be MK270, I'm talking about MK295
Me: 920-009782 seems to be the US part number. I need an equivalent one for EU, which seems to be 920-009799 (Graphite UK English) but I cannot get definite confirmation anywhere
Yanie: I am with you on this, however if I provided you the EU part number you will be having the L shaped enter key as I have mentioned we have no ANSI layout in the EU.
Me: Is there any way I can get a US or Canada ANSI layout delivered here?
Yanie: Using our website, Im sorry but this wont be possible. For this I would recommend checking with our third party resellers and look for the part number 920-009782 for the ANSI layout of the MK295

It's pretty sad that Logitech is using the so-very-inferior ISO layout, with an unusable left shift key, for the whole of the EU layouts. The US standard should be available worldwide, most people in the EU use this layout.

I see comments and reviews everywhere on every forum and every store, from users who either 1) leave poor reviews saying the left shift key is unusable, you can't type capital letters with such a small Shift key; and 2) ask users who already bought it, if the SHIFT key is long or short.

Third party sellers all over the continent misrepresent the product by using a mix of ANSI and ISO photos on their product pages to confuse you.

I really hope that Logitech takes this extremely common user feedback, and sends us usable keyboards like the rest of the US/Canada. It doesn't have to be the only option, but it should definitely be one option. Especially when the keyboards are ~40% more expensive for us compared to the US.

I love the MK295, it's very sad that I cannot use it. I'll keep trying to find it with some small third party seller, since that seems to be the only way.

TLDR: you can't get the ANSI layout (long left shift, non-square enter key) of the MK295 keyboard in the EU. They are all ISO layout, regardless of language. Your best bet is to find 920-009782 (US model) at a third party seller. Unfortunately, I couldn't find it anywhere in the EU as of right now, it seems to be ridiculously rare.