Linux 7.1 adds a new implementation of the NTFS file system; an improved swapping implementation; support for user.* extended attributes on sockets; enablement of Intel FRED on supported hardware for improved performance; BTF-powered io_uring; support for sub-schedulers in the sched_ext scheduler class; new flags to the clone3(2) system call to allow better pidfd-based process management; some new flags to fsmount(2), clone3(2) and unshare(2) to allow easier container management; and support for networking HW queue leasing. As always, there are many other features, new drivers, improvements and fixes.
You might also be interested in the list of changes done by LWN:
SOCIAL SHARE CARD GENERATOR