To wonder where your 5 year olds are socially?

[Bazingabong]

Dd is a new five. I'm worried about her social skills. Should she have made actual friendships yet? Should I be concerned if she will literally happily play with anyone but doesn't form an actual meaningful (to her) connection? She's very take it or leave it with other kids

Perfectly normal.
My ds was always like this - really popular, loads of different friends, but I'd struggle, throughout Primary to say who his "best friend" was or "closest friends" were
In fact, dd2 is a bit like it too.
Both are now adults and have LOADS of friends. ds will quite often say "I say X,Y and Z last night - we went for a curry" but "I'm going to watch the football tonight with "A,B, and C" then "D, E, and F are coming round tonight for a Fifa night" or "G, H, I, J and K and I have booked to go away next year".
I consider it a really positive things. He gets on with everyone and has 'fingers in lots of pies'

dd2 is quite similar. She's 18 now and I wouldn't put money on who she will be with next 5 times she goes out - it will be a right mix of different groups.

I wouldn't worry. I was like that and DD1 (5.5yo) is shaping up to be the same way. DD2 (3.5) is showing signs of being similar in so much as no one best friend and flitting between groups, but she is much louder and gregarious, and likes to play a crowd. Everyone is declared her best friend and follows her around 😂
I found I avoided a lot of the dramatic childhood 'life-ending' friendship break ups as I mixed with lots of different friends in different groups, and didn't get particularly bogged down with any one group's politics. I'm not more than acquaintances with school and uni friends now. I was happy with the set up and friendships at the time, it suited me. I became part of a group of now very close friends in my mid 20s, which has been lovely. They are not the type to do friendship dramas and the close-ness is great. It still isn't a case of one best friend. This group is a perfect fit for me though, which is maybe what I needed? 🤷🏻‍♀️

As long as your DD is happy, I wouldn't worry.

My daughter is extremely sociable, has many friends and is always on bloody plays dates - I think it’s quite extreme though and this can’t be the norm, now she’s on her break weve has someone round almost every day and she’s formed some close friendships while in school - she’s also in a very small class so perhaps this is why. My son is 3 and has no real friends per say, he’s very much take it or leave it, totally different from his sister.

My DD is like this. She's very popular and gets on with everyone. The teacher has told me on many occasions that she's very kind and includes others when playing with someone, which I think is brilliant. I'd much rather she doesn't engage in cliquey behaviour. At nursery she did have a "best friend" but this girl was very possessive and DD doesn't want to see her anymore now.

It's normal OP. Some 5 year olds make a "best friend" but in my opinion it's not always a healthy way to begin school. Deeper friendships may form from 7 onwards but it changes constantly.

My DD's are both in the "this is my best friend" realm...they're much older than yours now at 15 and 11 and over the years their best friends have changed a few times!

My ds and dd2 (now 23 and 18) are very much like SkaningPiglet describes.

Invited to lots of things, but never had any of the drama I read about on here - the 'cliques' or 'bitchiness' or 'fall outs' etc. I put it down to having friends from lots of different places - not totally reliant on any one group, or even worse, even one person.

There are lots of threads on MN about not having any friends, or asking how many friends people have, and it amazes me how many people seem reliant on one particular person, rather than happily "being friendly with" lots of people. Sounds like your dc is more the latter than the former, and it seems to make a much happier state of being.