Here are some thoughts about this from one of my word studies and three of my commentaries.
6:48 He saw them toiling in rowing. The verb is basanizō (βασανιζω) “to torture,” used in the passive, “to be harassed, distressed.”
The fourth watch of the night. It was between three and six in the morning.
Walking on the sea. The word “on” is epi (ἐπι) which when used with the genitive case as it is here, signifies contact. Our Lord’s sandals had actual contact with the water. He walked on the surface of the sea as we walk on a hard pavement.
Would have passed by them. The word “would” is the translation of thelō (θελω) “I desire.” He desired to pass by them. The word “by” is para (παρα) which means “beside.” The word “passed” is erchomai (ἐρχομαι) “to go.” The A.V., leaves the impression that our Lord desired to pass them by. But He went out on that turbulent sea in order to go to their help. This preposition para (παρα) when used in composition with a verb as it is here, denotes “situation or motion either from the side of or to the side of,” and thus means “near, beside, by, to.” The context points to the rendering. “He was desiring to go to their side.” An instance of this use is found in Acts 24:7, where the A.V., has “The chief captain Lysias came upon us,” and the same verb is used, parerchomai (παρερχομαι). Both Expositors and Robertson understand the meaning to be that Jesus desired to pass by the disciples, and parerchomai (παρερχομαι) has that meaning. But it also means “to come near.” The context is decisive for the latter, in the judgment of the present writer, since the reason why Jesus went out to the disciples, was, not to pass by and leave them to their fate, but to come near and help them in their difficulty, which thing He proceeded to do.
Translation. And seeing them constantly distressed in their rowing, for the wind was against them, sometime between three and six in the morning, He comes to them walking directly on the sea. And He was desiring to go to their side. ~Wuest, K. S. (1997). Wuest’s word studies from the Greek New Testament: for the English reader (Vol. 1, pp. 136–137). Eerdmans.
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would have passed them by. The more literal rendering, “desired to come alongside of,” indicates Jesus’ intention here. He wanted to test the disciples’ faith, so He deliberately changed course and came parallel to the boat to see if they would recognize Him and His supernatural powers and invite Him aboard. ~MacArthur, J., Jr., The MacArthur Study Bible & Commentary on Mark
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While the Twelve struggled against the elements, Jesus walked across the surface of the sea, stepping on and over the waves to where the boat was. He intended to “pass by them” in the manner of God in the Old Testament, who sometimes allowed His people to glimpse His presence as a means of reassuring them (e.g., Exod. 33:19–22; 1 Kgs. 19:11).
In the Old Testament, only God could tread upon the waves (cf. Job 9:8; 38:16; Ps. 77:19; Isa. 43:16). ~Swindoll, C. R. (2018). Mark (p. 175). Tyndale House Publishers.
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He meant to pass by them, not to avoid them, but so that they would see him walking on the water. The passage echoes the incident where God “passed” before Moses (Ex. 33:19, 22; 34:6), giving a glimpse of his glory. See Job 9:11, where Job says that God “passes by” him. By walking on the water, Jesus is essentially proclaiming his deity. ~Packer, J. I., Grudem, W., & Fernando, A., eds. (2012). ESV Global Study Bible (p. 1389). Crossway.
There are at least a couple of other ideas (that the authors of my other commentaries and word studies offer) about what "Jesus intended to pass them by" actually means, but I believe that the word study and commentaries above probably get closer to the actual meaning of this difficult verse (esp. when the context of the passage is considered).
This is certainly an interesting verse to consider, thanks for broaching it
@ThereRoseaLamb
~Deuteronomy