The TABLESPACES_EXTENSIONS table (available as of MySQL 8.0.21) provides information about tablespace attributes defined for primary storage engines.
The TABLESPACES_EXTENSIONS table is reserved for future use.
The TABLESPACES_EXTENSIONS table has these columns:
TABLESPACE_NAME
The name of the tablespace.
ENGINE_ATTRIBUTE
Tablespace attributes defined for the primary storage engine. Reserved for future use.