Köln has just ordered a Ciradis variant - 60m and swivelling bogies. Alstom
is promoting it as '
*Citadis type trams with special adaptations for the German market'*
<
https://www.alstom.com/press-releases-news/2020/11/cologne-public-transport-authority-commissions-alstom-and-kiepe
>

They are ordering 2 variants, in 30 and 60m. They state they will run all
over the network, but my memory of Köln / Bonn network is that the routes
are split between low and high platform routes and while the high floor
cars have folding steps for low platform boarding, so had universal route
availability, low floor cars couldn't operate on routes with high
platforms. I remember a 'station' in Bonn that served both low and high
platform routes with huge long platforms that had two sections, low and
high floor!

These new German cars are probably based on the Citadis Dualis tram-train
platform but fitted out as an Urban tram, not an interurban car.
I'd bet that like the Melbourne adaptation of the Flexity Swift they have
removed the steps at the bogies to make it a 100% barrier-free car.

What Melbourne requested of Bombardier with the E class isn't so unique. A
significant part of the additional cost of the Melbourne cars would be the
local industry support component, probably more so than the customisations.
Other 'informed' customers are asking similar things of their rollingstock
suppliers that Melbourne asked for. (Often including local manufacturing
component.)
I note that while Alstom is using the same Barcelona factory for assembly
that built the Sydney 305s to assemble this German order, they are using
Kiepe traction electronics, thus involving a large German supplier as part
of the build. The involvement of Keipe was probably one of the 'sweeteners'
of the deal.