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Questions about BLE security levels

We made the product by adopting BLE security mode 1, level 4.
According to the analysis of our products by the wireless communication certification authority,
We received feedback that "SMP Pairing Request" should be encrypted.

Does "SMP Pairing Feature Exchange" need to be encrypted to satisfy BLE security mode 1 and level 4?
The picture below is our packet analyzed by "ellisys bluetooth analyzer".



Please respond to relevant information.
Thank you.