OMAPI missing on Redmi 4A

I have a 5ber removable eSIM card that I want to manage with OpenEUICC.

However, the OMAPI interface is missing in this ROM as reported by euicc-probe. It was present in the unofficial Lineage 17 build by “Nick” and is working and detecting the esim card using the (not so privacy friendly) 5ber app, but openeuicc needs 11+

Is there a reason it’s removed and how could it be included in a custom rom build?

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