Portico Post-cancellation/perpetual access
In 360 KB and SFX (maybe in Alma as well) there exist several databases for Portico - triggered Content.
But Portico has a supplementary offer that is called "Portico - Post-cancellation/perpetual access". This offer contains journals from various publishers where the post-cancellation access is partly not through the platform of the publisher but through Portico.
You find some information about this offer here: https://www.portico.org/for-participants/#pca
The title lists for this database can be found here: https://www.portico.org/coverage/titles/ - it includes e-journals and e-books.
I ask you to add this database to SFX and 360 KB (and Alma if it doesn't exist there as well).