From hexdump to ascii (xxd -r stuck writing zero bytes)

To diagnose secure boot issues, I'm looking at the sbat sections of all bootloaders on a machine: sudo sh -c 'for f in /boot/efi/EFI/*/*.efi; do echo "$f"; objdump -j .sbat -s "$f" |xxd -r; echo; done' The idea is to compare with strings /sys/firmware/efi/efivars/SbatLevelRT-605dab50-e046-4300-abb6-3dd810dd8b23. I'm using xxd -r to go from objdump's hex output to plain ascii, but it looks like it isn't the command I want, because if the hexdump's first column contains large offsets, xxd will get stuck writing zeroes for longer than I can wait to get readable output. For example, for systemd-boot from systemd-boot-efi on ubuntu:

objdump -j .sbat -s /usr/lib/systemd/boot/efi/systemd-bootx64.efi
/usr/lib/systemd/boot/efi/systemd-bootx64.efi:     file format pei-x86-64

Contents of section .sbat:
 101319000 73626174 2c312c53 42415420 56657273  sbat,1,SBAT Vers
 101319010 696f6e2c 73626174 2c312c68 74747073  ion,sbat,1,https
 101319020 3a2f2f67 69746875 622e636f 6d2f7268  ://github.com/rh
 101319030 626f6f74 2f736869 6d2f626c 6f622f6d  boot/shim/blob/m
 101319040 61696e2f 53424154 2e6d640a 73797374  ain/SBAT.md.syst
 101319050 656d642d 626f6f74 2c312c54 68652073  emd-boot,1,The s
 101319060 79737465 6d642044 6576656c 6f706572  ystemd Developer
 101319070 732c7379 7374656d 642c3235 352c6874  s,systemd,255,ht
 101319080 7470733a 2f2f7379 7374656d 642e696f  tps://systemd.io
 101319090 2f0a7379 7374656d 642d626f 6f742e75  /.systemd-boot.u
 1013190a0 62756e74 752c312c 5562756e 74752c73  buntu,1,Ubuntu,s
 1013190b0 79737465 6d642c32 35352e34 2d317562  ystemd,255.4-1ub
 1013190c0 756e7475 382e312c 68747470 733a2f2f  untu8.1,https://
 1013190d0 62756773 2e6c6175 6e636870 61642e6e  bugs.launchpad.n
 1013190e0 65742f75 62756e74 752f0a00           et/ubuntu/..

Is there another way to unhex data while ignoring anything that comes before the first offset?