When PS4 Bedrock comes out, imports can be made between the 2 versions. Since PS4 Edition and PE are different versions, versions exclusive to one another, such as mobs, blocks, etc, importation between the 2 versions unfortunately will break the imported worlds if importation was available between PE and PS4 Edition. So, you will have to wait until PS4 Bedrock releases to import worlds between versions.
This post was made by Jaime Tirado (Jt91108)
December 8, 2019