This decision applies to “the navigable waters and soils under them”
It does not necessarily apply to title to all land within the state’s boundaries.
I’m still waiting for somebody to point to a reference where all remaining public land was transferred to ownership of a state at statehood, especially for states west of the Mississippi, where cession by other states was not an issue.
In MO, the one state I’m reasonably familiar with in this regard, federal public land was still being sold off by the US in considerable quantity through WWI, with some title transfers as late as the 60s.
But the language in the decision covered all property,
"when each of the designated States in the territorial area achieved a population of 60,000 free inhabitants it was to be admitted 'on an equal footing with the original States, in all respects whatever.'"
"Alabama is, therefore, entitled to the sovereignty and jurisdiction over all the territory within her limits, "