here a good information about all 190´s and TA´s with it´s Engines .
the critical altitude for the Jumo213a in 190D9 was ca. 18500ft=5600m and for the Jumo213E in 190D11 and TA152H ca. 31500ft=9600m.
But the best speed they reached above the critical altitude; f.e. 190D9 427 mph in 21500ft . This was due to the lower air density which needs lower Power (boost pressure decreased).
So it would be very fine if this can be implemented.
PS: for the BMW801D in FW190A4-A8 the critical altitude was 17500ft and for the A9 with BMW 801S 18550ft .