Check if there are any facilities in your area for secure bike storage, my nearby city for example offers free staffed bike parking and a free bus to get around. The inter city train station offers 20/7 keycard access bike parking with changing facilities, but that requires a deposit, proof of address etc.
I usually end up using one of these two facilities when I visit the city because of the rampant bike theft issues there, with the preferred one being the inter city station since it’s open almost all the time
There was even a docked e-bike hire offered by the local govt, which sadly went bankrupt because people were vandalising the e-bikes and destroying the docks ☹️