Convert Time to Format of 24 hours

Use below step where #"Changed Type" should be replaced with your previous step (The result will be in text format as Power Query time format is fixed as shown in your picture)

Table.ReplaceValue(#"Changed Type",each [Transfer time],each Time.ToText([Transfer time],"hh:mm"),Replacer.ReplaceValue,{"Transfer time"})

 See the working here - Open a blank query - Home - Advanced Editor - Remove everything from there and paste the below code to test

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WUorViVYytjIysDIyVwjwVYqNBQA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Transfer time" = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Transfer time", type time}}),
    Custom1 = Table.ReplaceValue(#"Changed Type",each [Transfer time],each Time.ToText([Transfer time],"hh:mm"),Replacer.ReplaceValue,{"Transfer time"})
in
    Custom1