Questions about full disk encryption keys and TPM

Assuming a dedicated attacker will gain unattended physical access to my pc

how will they go about getting my FDE key or otherwise open my luks drives and how can i prevent these attacks

Such as evil maid, bad usb, DMA attack, replacing the luks partition with his own, or otherwise tricking the tpm into revealing the key, or by modified boot that tricks me into revealing the key

Whats the best way to protect my FDE keys

Should i …

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