Perhaps the concept of pre-exhaust might be useful here. So, theoretically, contractions and tension are all that matter when building muscle. That being said, there’s still the mental aspect of lifting heavy.
Perhaps, instead of making front squats the primary lift in the beginning of the session, throw it in at the end so that you can use lighter weight while still creating the same relative tension.
As an example, I love to make regular back squats my main leg lift for ‘overall leg development’. And I love squatting heavy (6-10 reps). Then, later in the session, I’ll throw in the leg presses or elevated front squats and lift lighter weight for sets of 20-25.