As per recent UK Health Security Agency (UKHSA), at present three  hybrid variants of covid are in circulation throughout the world. The 2 combinations of Delta and BA.1 are XD and XF and the third one is XE.

XD is a combination of French Delta x BA.1 family which has spike protein of BA.1 and remaining genome of Delta with several 10s of sequences

XF a UK Delta x BA.1 family with BA.1 spike and structural proteins and 5 prime part of its genome from Delta and also contains several 10s of sequences too. 

The virulence of these hybrids are yet to be known but symptoms are same as XE variant.