Copy following to your clipboard:

@Article{,
author = {Oliver Kopp and Carl Christian Snethlage and Christoph Schwentker},
journal = {TUGboat},
title = {JabRef: BibTeX-based literature management software},
year = {2023},
issn = {0896-3207},
number = {3},
pages = {441--447},
volume = {44},
issue = {138},
ranking = {rank4},
}

Click on the "New entry" button

See that "Enter identifier" is selected

Desired behavior "Specify Bib(La)TeX" should be selected

Task

1. Modify org.jabref.gui.newentry.NewEntryView#finalizeTabs
2. Use heuristics that string starts with @ and then has letters and then has {
3. If match: select tab, set text and select all (similar to handling of identifiers)