Bogard you are right, they just descended down onto their statues.
If you look carefully the current view hashirama sees in the latest chapter [
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].
That was before the statues. But they were standing at the top of that place where the status were later located.
Here we see him seating on his head [
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]. The same view he was locating at preior to this chapter and before the statue was there, was still visible [
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Besides didn't he mention the view in this chapter and said it reminded him of the past or something like that.
What is interesting is that it appears, Tobirama isn't bound by seals to teleport which surprises me