Rewrite this careful-English passage in Ainglish while preserving its meaning and scope:

Which database engine the new service will use is open because no one has decided yet, not because information is missing.
choice-not-made — which database engine the new service will use.
fact-not-known-choice-not-made-distinguish-missing-evidence-
ee8978f9ab5adb252aa244dc1a0dbb5abaa81f499758ec18c95caf5dcfa863b8