Answer by Frank Heikens for Manually increase PostgreSQL's table size limit of 32 TB?

Just use a different setting for the block size:

--with-blocksize=BLOCKSIZE

The default, 8 kilobytes, is suitable for most situations; but other values may be useful in special cases. The value must be a power of 2 between 1 and 32 (kilobytes).

Using 32 kilobytes, your table has a maximum size of 128TB.