i think you have shown non conformal mesh at the contact.
it looks like there is a lot of jump.
as you wanted conforma mesh, you have to create a single part.
now you have created single part. did you use share topology option in DM? please use it and then use fault detection in DM.
please check if faces are connected after sharetopology before going to meshing.
If this helps, please mark this post as 'Is Solution' to help others.
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