Deutéronome 34:11

in all the signs, and wonders, and manifestations which the Word of the Lord sent him to perform in the land of Mizraim upon Pharoh, and all his servants, and all the people of his land;

IN ALL THE SIGNS. This is connected with the [preceding] verse, And there hath not arisen a prophet since in Israel — in all the signs etc. Or the verse may be stating that the Eternal knew Moses face to face through the signs and wonders as they were all done with His Great Name [i.e., the Tetragrammaton], just as he said, and He brought thee out with His Presence, with His great power.
Now, I have already explained, 4:32 and 13:2. that signs are the matters about which Moses warned [the Egyptians] before they took place, such as, by tomorrow shall this sign be, and the term is used for any phenomenon which the prophet forecasts saying, “Thus will it come and happen in the future.” Wonders imply a change in the natural order, such as the rod which was turned to a serpent., 7:15. Now, signs and wonders were also performed for the rest of the prophets, such as Elijah and Elisha who brought about many wonders [why is then the special significance attached to the signs and wonders of Moses]! However, the distinction of those [signs and wonders] of Moses our teacher is explained by the Rabbis in the Midrash: “All the prophets wrought miracles through prayer, such as the [halting of the] sun for Joshua, etc. (Joshua 10:12), which R’dak interprets as “prayed.” and [the revival of] the Zarephathite woman’s son, and the withholding of the rain by Elijah,, Verse 1. and the [revival of the] Shunammite woman’s son by Elisha. But Moses performed [signs and miracles] immediately [without prayer].” Yet this Midrash is not clear.
And the Rabbi [Moshe ben Maimon] stated in Moreh Nebuchim that “the distinction of Moses our teacher was that he spoke [publicly] to Pharaoh, and to all his servants, and to all his land, and in the sight of all Israel, for they [his signs and wonders] were in full view of his opponents and his followers. The rest of the prophets, however, performed them [the signs and wonders] in the presence of a few individuals, as it is said, Tell me, I pray thee, all the great things that Elisha had done.” indicates that they were not performed publicly in the presence of friend and enemy. But this does not appear to me to be correct [for the following reasons]: The withholding of the rain by Elijah — both the cessation and the coming — were very much publicized. It [the cessation of rain] was by his [Elijah’s] decree [rather than through prayer] as it is said, …

לכל האותות, the occasion when Moses experienced this type of communication from G’d described as פנים אל פנים occurred when he was called upon to perform the many supernatural miracles in Egypt. Clearly, his experience at the burning bush had not been of that calibre. Otherwise, why would the Torah have told us that he was afraid to look at the spectacle? (Exodus 3,6) This had been the very opposite of what G’d told Miriam and Aaron about his quality of prophecy in Numbers 12,8 i.e. that Moses can look without hesitation at visual images G’d shows him.