Heard rumors of combat patch being authorization for sinai deployment. Anyone heard that also?

Unless something has changed, the Sinai area is not considered a combat zone since Service Members are not receiving combat tax exempt status, and therefore are not authorized a patch on the right sleeve.

You're already earning a separate couple of medals. Unless something's changed since I retired I don't recall that being authorized!

Current Recognized Combat Zones
Sinai Peninsula
Under the Tax Cuts and Jobs Act (TCJA) enacted in December 2017, members of the U.S. Army, U.S. Navy, U.S. Marines, U.S. Air Force, and U.S. Coast Guard who performed services in the Sinai Peninsula can now claim combat zone tax benefits.

Afghanistan Area
By Executive Order No. 13239, Afghanistan (and the airspace above) was designated as a combat zone beginning September 19, 2001.

Afghanistan
The following countries were certified by the Department of Defense for combat zone benefits due to their direct support of military operations in the Afghanistan combat zone.

Jordan, Kyrgyzstan, Pakistan, Tajikistan, and Uzbekistan (as of September 19, 2001)
Philippines (from January 9, 2002 through September 30, 2015)
Djibouti (as of July 1, 2002)
Yemen (as of April 10, 2002)
Somalia and Syria (as of January 1, 2004)
Note. For the Philippines only, the personnel must be deployed in conjunction with Operation Enduring Freedom supporting military operations in the Afghanistan combat zone.

Kosovo Area
By Executive Order No. 13119, the following locations (and the airspace above) were designated as a combat zone beginning March 24, 1999.

The Federal Republic of Yugoslavia (Serbia/Montenegro)
Albania
Kosovo
The Adriatic Sea
The Lonian Sea – north of the 39th parallel
Note. The combat zone designation for Montenegro and Kosovo (previously a province within Serbia) under Executive Order 13119 remains in force even though Montenegro and Kosovo became independent nations since EO 13119 was signed.

Arabian Peninsula Area
By Executive Order No. 12744, the following locations (and the airspace above) were designated as a combat zone beginning January 17, 1991.

The Persian Gulf
The Red Sea
The Gulf of Oman
The part of the Arabian Sea that is north of 10 degrees north latitude and west of 68 degrees east longitude
The Gulf of Aden
The total land areas of Iraq, Kuwait, Saudi Arabia, Oman Bahrain, Qatar, and the United Arab Emirates
The following countries were certified by the Department of Defense for combat zone tax benefits due to their direct support of military operations in the Arabian Peninsula combat zone.

Jordan (as of March 19, 2003)
Lebanon (as of February 12, 2015)