To be fair, I’m only familiar with 2 primaries outside the one where I work, but in those, the existence of worksheets in EYFS is a thing of the past.
Play is structured, in that it has a purpose, Some examples
e.g. an outdoor activity, with toys that require balance, taking turns and consideration for others
e.g. activity in the “café” or “shop”where children are encouraged to “read” the menu or develop mark making skills by taking orders or making shopping lists.
e.g. a maths activity where children choose a criteria for sorting a variety of items, explaining to the adult and each other, why they have sorted this way (often starts with claiming a single group of items “because I like them”.
I could go on, as any EYFS teacher could.
The purpose of any assessment here, outside the DM framework is to see if children are ready to move on.
If they are succeeding in the examples given, then it would be unproductive to offer the same activity without prompts. Our EYFS children like the push button prompts where the teacher gives a purpose for sorting e.g. Can you sort them from smallest to largest? Or even children setting their own challenges for other children to try.
Certainly there are more formal activities, usually in small groups e.g. to develop pencil control-important because if children use a poor grip all the way though Reception, it’s hard to correct, but EYFS has changed immeasurably since I started teaching. The only thing that’s really the same as when I first started is that some children come to school already so capable, (soaking up reading or counting or writing) and pushed by their parents at home.