diff -r 7a18f6fc7e0c -r 7ba8adced391 mercurial/revlogutils/debug.py
--- a/mercurial/revlogutils/debug.py	Wed Jun 01 01:33:47 2022 +0200
+++ b/mercurial/revlogutils/debug.py	Wed Jun 01 01:33:13 2022 +0200
@@ -126,6 +126,13 @@
     return b"%d" % entry[constants.ENTRY_DATA_COMPRESSION_MODE]
 
 
+@debug_column(b"data-offset", size=20, verbose=True)
+def data_offset(index, rev, entry, hexfn):
+    field = entry[constants.ENTRY_DATA_OFFSET]
+    field >>= 16
+    return b"%d" % field
+
+
 def debug_index(
     ui,
     repo,