Since you are interested in Offenbach / Gulda: Cello Concertos, here is a list of other items that you may find interesting.
Paganini: 24 Caprices
Alina Ibragimova (violin)
[ Hyperion / 2 CD - released 21/May/2021 ]
""Ibragimova imbues each caprice with its own unique musical personality and expressive narrative, with the result that all those thousands of notes emerge with an emotional rather than merely technical imperative...Inimitable, unforgettable." BBC
Elgar: Cello Concerto / etc
Sheku Kanneh-Mason (cello), London Symphony Orchestra, Sir Simon Rattle
[ Decca / CD - released 31/Jan/2020 ]
Award-winning British cellist Sheku Kanneh-Mason returns with Elgar, a brand new album of works anchored around Elgar's Cello Concerto - arguably the best-known work in the classical canon written for solo cello.
J. S. BACH
Six Evolutions - Bach: Cello Suites (2017 recording)
Yo Yo Ma (cello)
[ Sony Classical / 2 CD - released 5/Sep/2018 ]
"I don't think he has ever made a greater recording and his personal booklet notes help provide a conceptual setting for his playing." Gramophone Editor's Choice Awards Issue 2018