Madd al-Muttasil and Madd al-Munfasil

There are several types of madd in the Qurʾān, two of which are represented in South Asian masāhif by two different signs:
madd al-muttasil

and madd al-munfasil.

But in Unicode there is only one char. Since Unicode has different chars for Arabic signs that have different semantics, I guess they showed add a second madda, shouldn't they?

Actually while the King-Fuad- and the King-Fahd-editions use the same madda sign that is used in MSA for hamza+following-alif for all instances of Koranic madda (which are all elongations without implicit hamza)

some South Asian masâhif have three different Koranic madda signs: one for madd lâzim (occuring only over the letter at the beginning of some chapters -- see above), one for madd al-muttasil (both have a length of 4 to 6 harakat) and a third one for madd al-munfasil (signaling 3 to 5 harakat).  I guess the standard Arabic madda can be used for the smallest (lowest on my pic), two additional Koranic madd signs (madd lazim and madd muttasil) have to be encoded for South Asian, Central Asia, Iranian and Nusantaran maṣāḥif (for the Ottoman [and Persian] writing tradition a third (long) madd sign has to be encoded.