Do I need to unencrypt a Bitlocker-encrypted C drive to partition it?

My C: drive is a 2TB SSD encrypted with Bitlocker. I want to split it into two partitions and move my data files to the second partition so that creating a boot image is less time consuming -- currently it takes all night. I separately back up the data files incrementally, so I don't need these to be in the disk image.

I have several related questions:

1. Can I do this without decrypting the C: drive using something like Minitool or EASUS partition managers?
2. If I don't have to decrypt, should I suspend Bitlocker while the repartitioning is happening?
3. After the split, will each partition be encrypted, or do I need to re-encrypt the new second partition?
4. Will the second partition have a different encryption key?
5. I also have a second internal drive. Will the second partition become D: and the second internal drive E:?
6. If the new partition will be E: can I rename it to D: and make the second internal drive E:?

I've gotten different responses to whether or not I need to turn off Bitlocker and am hoping for something definitive here.

I'm running Windows 11 Pro, 23H2.
Thanks!

You are like a E-Scooter driver on a 0,2 [HP] machine asking for driving instructions for a 200 [HP] motor bice!
You don't have the skills! And not knowing what you do and what you have to do, do this: Forget your bitlocker!
2. To resize your C-partition can be done from Diskmanagement. No 3rd party tools are needed!
3. Change your D-Partition to (E:) first. Can be done by Diskmanagement!
4. Shrink your C-Partition by Diskmanagement
5. Create the new D-Partition

A C-Recovery takes 2-3 minutes when your C-Partition is 150 GB, which is enough for 95 % !