Shibuya Sky walk in

Hi everyone, we will be in Shibuya on the first weekend of April, unsure if Saturday or Sunday. I did not make a reservation and it is too late to do so now as the timeslots we want are gone, and we would rather give it a miss than cancel the rest of our plans for the day to get there in the morning or early afternoon which are the only slots left for online reservation.
I am wondering if later slots are already sold out, since it is no longer available for booking on the official website or on Klook, or do they allow walk-ins even after online sells out?
It is not a very important attraction to us, seeing we already been to the skytree on a previous trip, and on the last trip we also already went to a tower with an outdoor area in Osaka.
If they allow walk-ins even if there is a moderate queue, we are prepared to do that, if they don't then it would be nice to know in advance so we can skip it entirely.
Thanks

Late November last year, we visited the Shibuya Sky.  We did not know if  a reservation was an option,  unfortunately tickets were sold out. However, we still went up taking  the same lift, but walked two floors down for a free viewing platform, still a beautiful view to behold. You might want to do  the same thing if you encounter the same situation.