The answers to your questions are quite easily found. For example, you say
"What I mean by this is... these jabs have been around for years for diabetic people, so why have they only just been 'released' to people despite obesity effecting the NHS for years?"
They have only recently been approved for obesity treatment because there is a process to follow to get a medication approved for a new usage. You need to do further clinical trials to show the medication is appropriate, effective and safe. You then need to submit that evidence to the regulatory authorities, the MHRA in the UK, who then spend some time analysing the evidence and then deciding on whether it's appropriate for use in the UK, who can access it and what the criteria for accessing it are. That makes it available for private prescriptions. Then the NHS need to do their own decision making process to decide if they can afford to use the medication, how to manage that and who to prioritise.
That process takes years, so it's not some conspiracy.
That leads me on to this comment
"I'd love to hear from someone educated in the medical field about whether these are actually safe for people without diabetes."
I am not a HCP or in a medical field, but I am educated... Of course they are "safe" for people without diabetes but with obesity. Safe as in any other medication is safe, so the health benefits across all the people using them will outweigh the risks. These medications are tested in clinical trials to exactly demonstrate that.
None of that has anything at all to do with Covid, which is some truly paranoid thought process.