The German Air Force Wing 33 is the only unit capable of deploying B61 nukes in the German Air Force.

Although the F-35 was eliminated from the competition to replace the Tornado, here's a possible livery of German Air Force Wing 33 had they converted to the F-35.

Instructions:
Extract/unzip and drop folder into your community folder.

***To comply with future nuclear disarmament treaties or to convert back to conventional JDAMs, delete the GBU-31 files in the textures folder.

Enjoy!

***Credit: Real image of B61 bomb belongs to its respective owner.

Wikipedia (German Air Force):

In 2018, the Air Force issued a request for information from manufacturers about four potential aircraft to replace the aging Panavia Tornados - the Eurofighter Typhoon, F-15 Advanced Eagle, F/A-18E/F Super Hornet and F-35 Lightning. In January 2019, it was announced that the F-35 Lightning had been dropped from the shortlist, with the Eurofighter Typhoon and Boeing F/A-18 Super Hornet under consideration. 

Wikipedia (Taktisches Luftwaffengeschwader 33):

Jagdbombergeschwader 33 is the only remaining unit in the German Air Force capable of delivering nuclear weapons. In bunkers at Büchel Air Base the United States Air Force can store up to 44 B61 nuclear bombs for use on the German Tornados. The number of currently stored bombs at Büchel is classified, but estimated to be between 10 and 20 bombs. The bombs are serviced, guarded and in case of war activated by the US Air Force's 702nd Munitions Support Squadron of the 52d Munitions Maintenance Group/52d Fighter Wing.

Due to the Büchel air base having a special mandate to ensure the safety of its nuclear weapons, the wing is the only flying unit of the Air Force to have an attached security squadron, the Luftwaffensicherungsstaffel "S". It is equipped with 429 soldiers, the largest squadron of the Air Force. On 1 April 2013 it was reclassified into two sections.