You simple cannot understand software development. Publisher is still brand new! They cannot put in every feature every user "demands" in the first release. It's not like the first release of Pagemaker had every feature of the current InDesign version.
We all have different priorities, but there are way more features out there that are essential than this, for most users (I'd guess more people probably need IDML import first). Packaging is convenient and they are working on it for future releases. Until then the current version of Publisher is quite capable for creating content for many users and it's without doubt the best thing that has come to life for desktop publishing, for us who want an InDesign replacement.
Hi WT1,
Welcome to Affinity Forums
Select the object layer with the FX you want to copy and go to menu Edit ▸ Copy, then select the one where you want to paste the effect and go to menu Edit ▸ Paste FX.
If you want this FX...style often, in other docs... than create a style, just rightclick on that text, shape... and select save as style. For shapes it will include the color/gradient, the stroke... and all in the FX panel. For text it will also save the font /size...