Do you mean: You currently have a separate partition mounted as /home and want to reuse this when installing a new distro?
Yes, there is a way to avoid creating a new one:

1. In the gui or tui installer, choose manual partitioning
2. If they don’t exist yet, create the partitions you want to use.
3. Specify their file system (ext4 or whatever you prefer), mount point or use, e.g. /, /home, swap.

!!! Be careful !!!

!!! For the /home partition make sure to uncheck recreate file system, format or alike. !!!
This is the partition currently filled with your data!

4. apply changes and procede installation.