I'd void warranty if I replaced the plug.
I very much doubt that this is true.
If the device is not useable without the original plug, it is not "fit for purpose".
Don't just assume things, check with both the manufacturer & your local laws re warranty.
The pics I uploaded have the L1 and Earth symbol (G), but doesn't list N. This equipment cannot run off 120VAC by itself. It's not one of those 120V or 240V. It requires 200VAC - 240VAC to operate. It's just a Power Distribution Unit for a server rack. A horizontal, metered one, made by Hewlett Packard Enterprise (or at least they outsourced someone to make it for them).
In the past, many US manufacturers made equipment for 240volt service.
Amateur radio linear amplifiers are, most often designed for 240v supplies, as it is difficult to source enough
power from the 120v Mains.
All the older, (pre-SMPS) US made stuff used in 240v countries used either of two approaches:-
Two transformer primaries which could be used in parallel for 120v, or, in series for 240v.
In both cases, the 240v wiring was built to US standards for their "split phase" 240v system, & normally used a DPST switch & fuses in both sides (hot & hot for the US system, & hence hot & neutral for, for instance, the Australian one)
Fusing the Neutral is technically against the rules in Oz, but there were plenty of US sourced units used in this country which did this.
Australian or European equipment will operate quite happily in the USA, in that it is designed so that both sides are regarded as "hot" (that way, if your power socket is wired with A & N reversed, insulation ratings are maintained).
One trap, is that non US standard 240v stuff may not have a DPST switch, & will, almost certainly, only fuse the Active side of the Mains.
If your device is from HP, it probably does conform with US standards.