Use Cases
The midpoint (·) is now widely used in the French language. Especially in inclusive writing. Many keyboards implement it. It has become a necessity.
Proposal
Making it accessible with a long press on the dot (.) seems the most relevant.
References
https://fr.wikipedia.org/wiki/Point_m%C3%A9dian#Utilisation_dans_l%E2%80%99%C3%A9criture_inclusive_en_fran%C3%A7ais
https://fr.wikipedia.org/wiki/Langage_inclusif_en_fran%C3%A7ais
https://communicationinclusive.fr/point-median/