No, just no. The big reason is that in terms of engineering, standing is one of the worst things you can ever do since we might not notice it cause our legs are automated by our brains for our own sanity, but it requires thousands of minute adjustments a second to constantly balance, account for inertia etc. In practice this would mean a fucking giant gyroscope which would take up a massive amount of space, energy and expense along with the motors, wiring, plating for the legs all for what would otherwise be accomplished by caterpillar treads or roadwheels, AKA you're wasting a lot on just being on par with existing systems while still retaining vunerabilities like exposed legs which can be knocked out from under you, whereas all that effort could go towards improving actual practical designs.
It's just a lot of effort for not a lot of gain, like what does it actually offer? Height? Flexibility? Not really since mech fingertips don't have nerves or hairs so they can't grip stuff like how you think they would and have a hand->trigger interface is just redundant when you could build it into the mech's systems proper which then makes it basically the same as any other armoured vehicle. Layers upon layers of redundancies. >>1308>In space
Even then not really, what benefit would a huminoid shape offer over say a sphere? Shape doesn't matter because there's no drag in space(I know technically there is but it's so minute it hardly matters) and the chassis can still can grip, maneuvers better, more efficient armour layout, more compact so smaller silhouette etc etc which is funny since those ball mechs in Gundam were considered hopelessly outclassed lol