Is it possible to list out all the previous hotfixes installed on TDV?

Yes. It is possible to find out the list of hotfixes installed on TDV server by looking at the contents of "[TDV Server installation dir]\install" folder.  The folder stores rollback scripts whose names contain the hotfix numbers, as in the example below.

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Directory of C:\Program Files\TIBCO\TDV Server 7.0\install       ..
09/07/2018  12:15 PM   cis_version.txt
10/18/2018  12:35 AM   rollback_TDV_server_7.0.8_HF-001_all.bat
10/18/2018  12:35 AM   rollback_TDV_server_7.0.8_HF-001_all.sh
01/22/2019  08:19 PM   rollback_TDV_server_7.0.8_HF-002_all.bat
01/22/2019  08:19 PM   rollback_TDV_server_7.0.8_HF-002_all.sh
10/18/2018  12:35 AM   TDV_server_7.0.8_HF-001_all.txt
01/22/2019  08:19 PM   TDV_server_7.0.8_HF-002_all.txt
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This example listing shows that that two hotfixes have been installed, which are 7.0.8_HF-001 and 7.0.8_HF-002.