How to merge multiple rows into columns using left joins

Question

I'm currently stuck trying to write a query in MS Access using multiple left joins.

It should merge the results of a query with the data of an existing table. Table "Adressen" contains an unique identifier which should be used for the LEFT JOIN. "q_TestMatchen" however has multiple rows per uuid, one for each [betreiber], which means that there can be uuids where no data for [betreiber] = "Carrier1" is available.

Eventually I want to have one row per [uuid] with the matched columns of "q_TestMatchen" appended at the end.

I hope that this makes sense so far.

Below is my current code:

SELECT q.*, v.betreiber, v.ist_down, v.ist_up, v.ist_tech, v.plan_down, v.plan_up, t.betreiber, t.ist_down, t.ist_up, t.ist_tech, t.plan_down, t.plan_up
FROM (Adressen AS q 
LEFT JOIN q_TestMatchen AS v ON q.uuid = v.uuid)
LEFT JOIN q_TestMatchen AS t ON q.uuid = t.uuid 

WHERE (q.[betreiber] IS NULL AND IIF(v.[betreiber] IS NOT NULL, v.[betreiber] = "Carrier1", 1) AND t.[betreiber] = "Carrier2") AND q.fa <> 0;

This is what the result of the input query "q_TestMatchen" looks like (same columns as in table "Adressen", but the fields 'betreiber', 'ist_down' etc. are empty there):

uuid	x	y	....	betreiber	ist_down	ist_up	.....
DETEST1234	23.4567	45.2345	....	carrier1	250	....
DETEST1234	23.4567	45.2345	....	carrier2	1000	....
DETEST1235	23.6789	45.3456	....	carrier2	1000	....
DETEST1236	23.3456	45.1523	....	carrier1	500	....
DETEST1236	23.3456	45.1523	....	carrier2	100	....

This is what I want the table to look like in the end:

uuid	x	y	....	v.betreiber	v.ist_down	....	t.betreiber	t.ist_down	.....
DETEST1234	23.4567	45.2345	....	carrier1	250	....	carrier2	1000	....
DETEST1235	23.6789	45.3456	....			....	carrier2	1000	....
DETEST1236	23.3456	45.1523	....	carrier1	500	....	carrier2	100	....

The code above is working, but it generates two rows per uuid, which is not what i eventually want it to be.

Thanks for your help in advance. Best Regards, Michael