Overview: 6.3.x must lock to stripes-webpack ~4.1 (without stripes-ui) in order to remain backwards-compatible with Nolana (2022-R3).
Details: stripes-webpack beginning in v4.2.0 looks for its entrypoint in stripes-ui instead of stripes-core. stripes-ui wasn't added to @folio/stripes until v8.0.0, the Orchid (2023-R1) release. Given that eslint-config-stripes v6.3.x was available at the time of the Nolana release, everything in the eslint-config-stripes v6.3.x line should continue to leverage stripes-webpack v4.1 in order to build @folio/stripes v7.x.
Additional details: Slack conversation