Once the Senate remains in recess past 30 days, then I’ve read that the president has the option to step in and issue appointments. Those appointments are then subject to review and requires Senate certification and approval once they do re-convene. Can’t find the link just now. Too early. Gotta go to work.
A recess appointment can be made without Senate confirmation.
Its only temporary and expires within two years or whatever the term limit is of the appointment.
A recess appointment doesn’t put a nominee on the Supreme Court for life.