I'm in Los Angeles and it's mostly by business and real estate interests.
Republicans, like Rick Caruso, run as Democrats because that's how you get elected here. It's a meaningless label.
They'll do culture war signaling like support for pride month to their Twitter feed but when it comes to actual policy, for instance, the "defunding" of the LAPD which just last month included 780 more police, a new helicopter ... https://knock-la.com/lapd-budget-2023-increase/ an increase of $118,000,000, it's a different story.
On homelessness, actual leftists advocate for strong regulation on housing costs, bans on speculation, criminalization of landlords who do illegal evictions, seizing of idle real estate for redistributive housing, things like that.
You may disagree, but that's what the actual left position is. It's not buying new helicopters for the cops or giving them 100 million to do encampment sweeps where they throw away medication and wheelchairs and then classify it as "homeless abatement".
The policy, in practice, is increased money for police, shelters without storage or mail services, encampment sweeps, and a blind eye to landlord and market forces. In a Venn diagram with most conservative approaches, it's a pretty significant crossover.