https://books.google.com/ngrams/graph?content=primary+school+teacher%2Cearly+years+educator%2Cpreschool+assistant&year_start=1800&year_end=2019&corpus=en-2019&smoothing=3

“This book is written for teachers of young children aged from 5 to 12 years in primary schools who want to support students' English vocabulary.”
Uly, детский сад is where they take care of/teach children aged from 1.5-2 to 6-7 years.
Nursery school teacher?
Kindergarten teacher (as has been proposed)?

Я согласен с Татьяной. Primary school - начальная школа (в UK - с 6 лет)

В UK primary school с возраста 4-5 лет.

Да, пожалуй с 4, а не 6. Но все равно это школа, а не детский сад (nursery, day care, pre-school)

We have primary, elementary, middle, and high school. Primary is everything from kindergarten/daycare to 3rd grade. https://www.merriam-webster.com/dictionary/primary%20school

And you also have primary teachers in the UK: https://www.randstad.co.uk/career-advice/job-profiles/primary-teacher/

Kindergarten teacher also works.

And you also have primary teachers in the UK: https://www.randstad.co.uk/career-advice/job-profiles/primary-teacher/

Yes, but this is to "educate young children from four years", that is primary school, not "детский сад"
https://www.gov.uk/schools-admissions/school-starting-age

Since educational systems are different from county to country, I’d consider the “daycare teacher” to be the most accurate translation here.