Does the rock in Numbers still represent Christ even though Moses struck it instead of speaking to it?
Yes. The rock in Numbers still represents Christ even though Moses struck it instead of speaking to it. All through Scripture, when the rock appears as a type, it is Christ, and that figure never deviates. The manner of Moses' action did not change what the rock typified.
Les explains that Paul makes the rock in Israel's wilderness experience so plain: the rock was Christ. He emphasizes that all through Scripture, from the beginning of the Old Testament to the end, whenever there is a typical reference to the rock, the rock is Christ, none other, and it never deviates. So whether it is the rock struck in Exodus or a little later in Numbers, when Moses was supposed to have spoken to it but struck it, the rock is still Christ. Les also points to Daniel 2, where the rock cut out without hands strikes the image on its feet, picturing the Second Coming of Christ as a smiting stone, and to Matthew, where Peter confesses Christ and Jesus speaks of the rock upon which He would found the Church. Therefore, Moses striking the rock in Numbers does not alter the typology; the rock remains Christ.
Behold, I will stand before thee there upon the rock in Horeb; and thou shalt smite the rock, and there shall come water out of it, that the people may drink. And Moses did so in the sight of the elders of Israel.
And Moses lifted up his hand, and with his rod he smote the rock twice: and the water came out abundantly, and the congregation drank, and their beasts also.