In reply to Graeme Alderson:
Do you have any more details? The website for the 2022 European Championship gives Königsplatz as the venue, which isn't in the Olympic Park. But otoh I can't off the top of my head think of any suitable indoor venues near there. If it really is Königsplatz I assume they'll be building a big temporary outdoor lead wall, which should be cool.
The old Olympic Stadium bouldering venue had a great atmsophere, but could get intolerably hot under the perspex roof on sunny afternoons.