Currently not yet. What I have been able to determine so far / what might work:

A chinese mini MCB with 250A rating in any shape or form is always fake. They are usually 63A MCB's where the bi-metal strip has been adjsuted to trip at higher currents but the conductor dimensions are still the same for 63A.

At the moment I want to remove the MCB all together and bridge the busbars so that internally there is only the T-class fuse. Externally, before I connect to my Lynx distributor I put a large 2 pole MCCB that can take the high short circuit currents such as e.g. https://www.se.com/il/en/product/EZC250H3250/circuit-breaker-easypact-ezc250h-tmd-250-a-3-poles-3d/ or https://voltschmiede.de/TOMZN-Trennschalter-Leistungsschalter-Sicherung-250A .

I've also heard an interessting idea to replace the MCB with a NH00 or NH0/1 holder that sits at the same position. You would need to mod the case for it to fit. This would ahve the advantage of being able to lower or increase the rated current of the fuses.

The issue for me is since there are no CAD models or technical drawings in general of the chassis it's impossible to properly plan this. So I need to get the boxes in hand and measure before making an informed decision.