Countifs based on cell value and date range

EDIT
you seem to have fixed

Ignore - I see now
you replaced the = with a ,
=COUNTIFS('Survey Data'!A2:A500000 = "D",'Survey Data'!X2:X500000,">="&B2,'Survey Data'!X2:X500000,"<="&C2)
to
=COUNTIFS('Survey Data'!A2:A500000 , "D",'Survey Data'!X2:X500000,">="&B2,'Survey Data'!X2:X500000,"<="&C2)

the formula looks ok
BUT whats in B2 and C2 - i assume a date - correctly formatted as a date
AND
the contents of
'Survey Data'!X2:X500000
column X is actually dates as well and NOT text

click on column
'Survey Data'!X2:X500000
change the format to General
ALL the cells should change to just a number
44737 is the 25th June 2022
number of days from 1900 - which is how excel works dates
so as its almost midnight in UK
tomorrow - 26th June 2022 will be
44738

Note: Images are difficult to see , and also requires that I input all the data myself, which is very time consuming.

A sample sheet would help here


Please see the Yellow Banner at the top of the page explaining how to attach a sample spreadsheet

A good sample workbook has just 10-20 rows of representative data that has been desensitised. It also has expected results mocked up, relevant cells highlighted and a few explanatory notes.

Here are the instructions, found at the top of the page again

Post a small Excel sheet (not a picture) showing realistic & representative sample data WITHOUT confidential information (10-20 rows, not thousands...) and some manually calculated results. For a new thread (1st post), scroll to Manage Attachments, otherwise scroll down to GO ADVANCED, click, and then scroll down to MANAGE ATTACHMENTS and click again. Now follow the instructions at the top of that screen.