It’s possible, but given the limited numbers of showings and scarcity of equipment and qualified people to service and run it, I can’t imagine anyone cutting new aperture plates or installing them specifically for this.
Orient Express was letterboxed 2.40:1 within the 2.20:1 frame on the 70mm...
True, but for whatever reason, I think they just opted to standardize it within one of the standard DCP options. Unfortunately my American Cinematographer subscription is no longer active so I can’t say for sure.
I think they opted to slightly crop it to 2.40:1 during the DI process because there is no DCP standard for 2.20:1 presentation. Most commercial theaters wouldn’t be able to properly display it.