Add support for efr SGM-C4 meter

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Is it possible to add efr SGM-C4 meter support to libsml?
According to this page
https://www.photovoltaikforum.com/thread/158054-libsml-error-unrecognized-sequence-beim-smartmeter-efr-sgm-c4/?pageNo=1
the meter is not fully supported to the existing library.
There seems to be some difference to the "standard" sml protocol.
https://www.efr.de/wp-content/uploads/2022/06/Produktinformation_EFR_SGM-C4_EN_WEB.pdf