'How to get Laravel Collection items nested inside a collection

I am trying to get all the items in the nested collection of times to export to an excel file. 0 is the user info while 1-3 is Monday, Tuesday, Wednesday. the items inside the days are time blocks the user added.

Picture of My collection

This is my map function to get the information and right now $avails1, 2 and 3 all print the times.

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The information displays like this which is fine but I would like to be able to remove the brackets and quotes

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Am I going about this the wrong way?



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