Had contact with someone from Meraki Support. The person claimed it was supported.
So also send the case to my Account manager because I don't think it's true. But on the other hand. Another switch shows this with the same firmware version and running in Hybrid mode already.
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Meraki Cloud Monitoring: Compatible
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Meraki Cloud Management:
Compatibility Check Status
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Boot Mode INSTALL - Compatible
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Switch# SKU Bootloader Version Network Modules
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2 C9200-48P - Compatible 17.15.1r - Compatible C9200-NM-4X - Compatible
Compatible SKUs: C9200-24P, C9200-24T, C9200-48P, C9200-48T, C9200-24PXG, C9200-48PXG, C9200-48PL
Compatible NMs : C9200-NM-4G, C9200-NM-4X, C9200-NM-2Y, C9200-NM-2Q