Is it safe? If you know what you are doing and nothing goes wrong. I do not own a Dell laptop so I have never needed to try this procedure.
on my dell it work without problem .
you can disable dynamic intel platform to avoid dynamic pl1 too.
on my dell g5 5900 10750h nvidia 2060 bios version 1.10 location is
0x3a8 in Setup Store.
C8D8 QuestionId: 0xAF equals value 0x1 {12 06 AF 00 01 00}
0x8C8DE One Of: Intel(R) Dynamic Tuning, VarStoreInfo (VarOffset/VarName): 0x3A8, VarStore: 0x1, QuestionId: 0xA49, Size: 1, Min: 0x0, Max 0x1, Step: 0x0 {05 91 80 0F 81 0F 49 0A 01 00 A8 03 10 10 00 01 00}
0x8C8EF Default: DefaultId: 0x0, Value (8 bit): 0x0 {5B 06 00 00 00 00}
0x8C8F5 One Of Option: Disabled, Value (8 bit): 0x0 {09 07 04 00 00 00 00}
0x8C8FC One Of Option: Enabled, Value (8 bit): 0x1 {09 07 03 00 00 00 01}
0x8C903 End One Of {29 02}
0x8C905 End If {29 02}