Nether portals that are /setblock in the End do not teleport you to the Nether, unlike Java Edition

^{Description update from MCPE-78510:}
When I went to the End dimension and used /setblock ~ 64 ~ portal and went into the portal, I saw I was in a block. I teleported higher and saw I was in the overworld.

Steps to reproduce

1. Build an end portal or do /setblock ~ ~ ~ end_portal
2. Do /setblock ~ ~ ~ portal

What I observed
I was in the Overworld instead of the Nether and there was no Nether portal.

What I expected
I would be in the Nether with a Nether portal.

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Original Description:
Pretty much the description, i assume there's java parity in the works?