Yes, cell towers can transmit multiple signal types.
Yes, cell towers can transmit multiple signal types.
Generally, a single cell tower can support both 5G and LTE, but they may operate on different frequencies or bands. Mobile providers often configure their networks to use separate towers for each technology to optimize performance. Whether you see one tower or multiple depends on the network setup and coverage goals.
Generally there is a limit to how many can fit on a tower and thus how long older generations remain, and thus carriers will actively retire older networks entirely.