Your TSH and FT4 are low because you are taking T3. Perfectly normal. Your body only hangs on to the T4 it needs - T4 is a storage hormone - it doesn't need much in store because a) it doesn't need to convert much, given the amount of T3 you are taking, and b) you are taking a decent dose of T4 every day.
So, no, the FT4 does not need bringing up, and neither does the TSH.
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