Admittedly, things could have changed since the 2019 event, but Olympia has a 1.95m (~6’5”) maximum height restriction, from memory. I think the minimum is 1.4m (~4’7”).
So I’m afraid that you likely wouldn’t be allowed on if they are stringent with checking the maximum height restriction. Assuming you wore regular shoes, you’d likely be over 2m if they measured you, so you’d clear the max height by a fair bit, I’m afraid. There is a chance they might not be too stringent with the maximum height restriction checking (I was told that unlike the minimum, the maximum is often more of a guideline than a concrete limit, so it’s checked less often).
I can’t say I’m surprised given how tight the legroom in the cars is… from memory, Olympia’s cars are not dissimilar to the back car on Colossus at Thorpe, where there’s relatively little legroom. For clarity, I’m around 5’9.5” (1.77m), and my legs were quite tightly squeezed in on Olympia, from memory.