Update, the configurators are now up at BMW.de and BMW.uk also:
UK
https://configure.bmw.co.uk/en_GB/configure/G82 (M4)
https://configure.bmw.co.uk/en_GB/configure/G80 (M3)
Germany
https://configure.bmw.de/de_DE/configure/G82/51AZ (M4)
https://configure.bmw.de/de_DE/configure/G80/51AY (M3)
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The full M3/M4 Configurator is not available just yet, but on the Australian website you can do a basic configuration.
It has the full colour palette, interiors, trim and wheels.
Give it a try:
https://www.bmw.com.au/en/all-models...-overview.html
https://www.bmw.com.au/en/all-models...-overview.html