Gizlot - I have had the occasional yapper in adolescence. It’s very annoying but I waited it out. Zero reaction. Actually I didn’t even treat when quiet but I did warn my dog less neighbour that they were in for a bout of irritation. “I’m ignoring the puppy barking [I deliberately said puppy to reinforce that he may not look like one he isn’t an adult] but the aim is to prevent it in adulthood so please bear with me, as neither of us want a barking dog long term”. Adolescence for puppies is another painful stage if not more annoying than the first because it feels like they should be grown up when actually it’s just a litany of more (mostly temporary) problems.
Losing - he is very new isn’t he? Did you get him at 8 weeks or is he older?
it’s very very early to expect him to be more settled. I know that’s not going to feel helpful and has made your heart sink but his jumping and biting at your face is not aggression, in fact (and I’m not looking at him in person obviously!) that is usually a sort of exuberant pleased thing, it’s just not ideal to be on the receiving end of if you don’t like it.
things you’re already doing but to recap: and possibly add the last one if you don’t have jt
Good routine: most puppies thrive on routine as they learn it fairly fast and it helps them feel secure. It looks like yours is fine, but stick with it.
Removing yourself calmly from biting behaviour - put him gently on the floor and busy yourself with something else.
Providing a variety of chewy things: hard/soft/knobbly/frozen - and squeaky things if you like.
Snuffle games. Scent work calms puppies. Scatter some kibble in the grass (this works best if your puppy is food motivated) and let him find them by smell. It lowers adrenaline and cortisol and raises calming hormones like oxytocin. Kibble in a teatowel can work too but he might be too young to do anything than chew a hole in the teatowel… they should snuggle with their noses to unroll it.
Games help bonding and sleep. Hiding his favourite treats here and there for example.
Throwing balls jazzes puppies up rather than tire them out so I don’t recommend that. Sniffing is a better and gentler way to tire them than trotting or racing after something and bringing it back repeatedly. It gets their adrenaline pumping and then they get overstimulated: bitey.
It does take a few weeks to build a bond - from both sides. You’re doing really well, even if it doesn’t feel like it. You’re providing a safe home, being kind to him, thinking of his needs and doing your utmost. You’re a kind and caring owner who gives a shit about his wellbeing, so please remember that as he is getting to find it out and believe it.