Querying multiple databases using MSforeachDB - multiple-databases

Question

I'm querying about 60+ databases using MSforeachdb. The query works when I run it on a single database but I get a syntax error when I use MSforeachdb. Here is the code i used to query one database:
SELECT
DISTINCT(PAMARTID)
,PAMSTAID
, Gender
, DaysToNextApp
, DATEDIFF(day, DateofVisit, DateOfNextApp) AS date_difference
,DateOfNextApp
, DateofVisit
, MONTH(DateofVisit) AS Month
, DATENAME(month, DateofVisit) AS Month_Name
, YEAR(DateofVisit)AS Year
, REGID
, Description
, ROUND (DaysToNextApp/28, 0) AS MMD
, DATEDIFF(month, DateofVisit, DateOfNextApp) AS MMD_based_on_difference
FROM dbo.PAM p JOIN dbo.LuRegimen r ON p.PAMREMID = r.REGID
WHERE PAMSTAID = 2 AND (DateofVisit BETWEEN '2021-10-1 00:00:00:000' AND '2022-09-30 00:00:00:000')
I then adapted it for use on multiple database:
DECLARE #sql AS VARCHAR (4000)
SET #sql = 'IF ''?'' NOT IN(''master'', ''model'', ''msdb'', ''tempdb'')
EXECUTE ('' USE \[?\]
SELECT
DISTINCT(PAMARTID)
,PAMSTAID
, Gender
, DaysToNextApp
, DATEDIFF(day, DateofVisit, DateOfNextApp) AS date_difference
,DateOfNextApp
, DateofVisit
, MONTH(DateofVisit) AS Month
, DATENAME(month, DateofVisit) AS Month_Name
, YEAR(DateofVisit)AS Year
, REGID
, Description
, ROUND (DaysToNextApp/28, 0) AS MMD
, DATEDIFF(month, DateofVisit, DateOfNextApp) AS MMD_based_on_difference
FROM dbo.PAM p JOIN dbo.LuRegimen r ON p.PAMREMID = r.REGID
WHERE PAMSTAID = 2 AND (DateofVisit BETWEEN ''2021-10-1 00:00:00:000'' AND ''2022-09-30 00:00:00:000'')'')'
EXEC sp_MSforeachdb #command1 = #sql
however the above gives a the following error:
Msg 102, Level 15, State 1, Line 19
Incorrect syntax near '2021'.
I removed the the following piece of code
AND (DateofVisit BETWEEN ''2021-10-1 00:00:00:000'' AND ''2022-09-30 00:00:00:000'')
from the sp-MSforeachdb query and it worked but if I add it again I get the aforementioned error
Any help or alternative methods would be appreciated.