I also had a maintenance failed and running kopia content verify I got
ERROR error content 0049536060c06487b10eb5eb6aee4960 depends on missing blob p748b1f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f
ERROR error content 1949ad63938774992d64fd2145901947 depends on missing blob p748b1f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f
Verified 816376 contents, 2 errors, estimating...
ERROR error content 30c0284da1a949f32fd3a1d81730186c depends on missing blob p748b1f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f
ERROR error content 3586e7d2494257bf0e91ba598192e073 depends on missing blob p748b1f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f
Verified 1651009 contents, 4 errors, estimating...
ERROR error content 60070dd6ee5b260339bcb8c4f264109d depends on missing blob p748b1f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f
ERROR error content 6e4bd795c29e93e279f10cc5613d3c33 depends on missing blob p748b1f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f
ERROR error content 819b158bc8f2ca49ede203c6812d825e depends on missing blob p748b1f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f
ERROR error content 85bd53db258bbf181177379e688ddfed depends on missing blob p748b1f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f
Verified 2469527 contents, 8 errors, estimating...
ERROR error content 8cd541289b1131e32ef298ccfab096f0 depends on missing blob p748b1f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f
ERROR error content 8d9f9ab3d906c3e0af9911c8e5f54dff depends on missing blob p748b1f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f
ERROR error content 8e393036a1639314d8c2a15888103ea0 depends on missing blob p748b1f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f
ERROR error content 98d1792d0a0a8b75a374a520f2916e80 depends on missing blob p748b1f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f
ERROR error content a8849ef6cf3434da69d50a543a3a22a5 depends on missing blob p748b1f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f
ERROR error content ad32b4963ca0ed2c875b8eb59c501e79 depends on missing blob p748b1f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f
Verified 3299907 contents, 14 errors, estimating...
ERROR error content bb0ddfffd8b91888a5b3fdfd3bc57363 depends on missing blob p748b1f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f
ERROR error content d46d76eb16ca13bcc3c5caaa4bf0380e depends on missing blob p748b1f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f
ERROR error content d80ffe27abf94ba10e13ab1becc4af3c depends on missing blob p748b1f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f
ERROR error content e1900ee2ee3d6688a33264e6bda3270f depends on missing blob p748b1f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f
Verified 4132143 contents, 18 errors, estimating...
ERROR error content ed0e82bb04085f7cbaf14b4c50c73a45 depends on missing blob p748b1f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f
ERROR error content f2f6cf6558d2e8a58454e407a7a13836 depends on missing blob p748b1f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f
ERROR error content ff5ab46cb3052cfad6b9f954d41f2508 depends on missing blob p748b1f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f
Verified 4801105 of 5431000 contents (88.4%), 21 errors, remaining 1s, ETA 2022-05-09 07:17:56 CEST
Verified 5233582 of 5431000 contents (96.4%), 21 errors, remaining 0s, ETA 2022-05-09 07:17:58 CEST
Finished verifying 5431000 contents, found 21 errors.
In the backup location I found f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f.f.tmp.379250a93e956e3e which I renamed to f82c70d8f6fa6db19275169de10-s6b893eff8c4daefc10f.f .
Thanks to @zyradyl who described in Maintenance Failed due to missing blobs, content verify fails, next steps? (after having had a session with Jarek) how to resolve this.