One-directional Transactional Replication is causing one table's Clustered Index to be copied over as a Nonclustered Index in the subscriber database?
maybe it's a bug in the SSMS; try to scritp the @schema_option and verity the proper value based on the list here:
https://docs.microsoft.com/en-us/sql/relational-databases/system-stored-procedures/sp-addarticle-transact-sql?view=sql-server-ver15