Spyder data combine according to timestamp and filling empty slots

Question

Dear members, I have been trying for many days to sort and combine data according to timestamps. I don't have much knowledge about Python and trying multiple online codes. Can you please guide me on how to combine data according to timestamp? Like after one data, the other file data is inserted on the same timestamp in columns after the first file data. I do have some missing/empty spaces which need to be sorted accordingly. Please help. thank you in advance.