Hi. After hours of reading a lot of how to’s in the web and trying those that I thought would give me the light of day on how to cast my Excel spreadsheet from the phone to the TV, this forum might help.
I was issued a Samsung Galaxy 52 phone and a smart TV with a built in chrome cast was made available in the office for virtual meetings.
I downloaded Excel, Word and powerpoint files from one drive and saved them in the phone.
Screen mirroring photos and you tube works fine but I couldn’t find the airplay button when I open the spreadsheet file for casting.
I had the Smart View app installed but had not subscribed to the yearly subscription.


Thank you for any help.

AFAIK Samsung phones all have screen duplicating functions . In my S9 it's called Smartview and is not an app. It appears when you pull down the upper drawer.
You just have to connect it on the tele which should be on the same network

Chromecast also has a duplicate screen function

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I didn’t know that there is a smart view in the phone. When I opened it, it says that for chromecast devices, use the Google Home app.
Thank you.