I didn't tell my company back then when I was working at the office that due to our open space offices, I was wasting around 3h/day due to difficulties to focus (and, well, mainly because I can't actually get 8h straight of focused time).

So, no, I haven't changed my mind: I'm still not telling my company that I don't get 8h/day of focused work.

Regarding appearing online: I couldn't care less (so no, I don't appear to be online).