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There was an old trick regarding deploy BP only ios project with Editor only 3rd party engine plugin you might want to try: (That trick came from the date I still did ios dev, it might not work now)
Open MeshTool.uplugin (Default location: C:\Program Files\Epic Games\UE_4.18\Engine\Plugins\Marketplace\MeshTool\MeshTool.uplugin)
Change line:
"Installed": true,
to:
"Installed": false,
You should be able to deploy BP only ios project now without disabling/removing the particular editor only engine plugin. (Hopefully)