diff --git a/.changeset/brown-books-carry.md b/.changeset/brown-books-carry.md
new file mode 100644
index 0000000000..1299354445
--- /dev/null
+++ b/.changeset/brown-books-carry.md
@@ -0,0 +1,5 @@
+---
+'@backstage/frontend-app-api': patch
+---
+
+Create a core components extension that allows adopters to override core app components such as `Progress`, `BootErrorPage`, `NotFoundErrorPage` and `ErrorBoundaryFallback`.
diff --git a/.changeset/clever-wombats-sneeze.md b/.changeset/clever-wombats-sneeze.md
new file mode 100644
index 0000000000..ffd94aa9f0
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+++ b/.changeset/clever-wombats-sneeze.md
@@ -0,0 +1,5 @@
+---
+'@backstage/frontend-plugin-api': patch
+---
+
+Create factories for overriding default core components extensions.