NVIDIA G98M [GeForce 9300M GS] supported drivers on Ubuntu 21.04

Hello,
I have “jumped into cold water” by installing devel version Kubuntu 21.04. But - besides the many to be expected daily updates - most things work like a charm.
Now I have a question not necessarily related to K 21.04 proper:

inxi -F shows the respective parts of my laptop to be the following:
System: Host: hslaptop Kernel: 5.10.0-14-generic x86_64 bits: 64 Desktop: KDE Plasma 5.21.2
Distro: Ubuntu 21.04 (Hirsute Hippo)
Machine: Type: Laptop System: Sony product: VGN-AW11M_H v: C6010CXT serial:
Mobo: Sony model: VAIO serial: BIOS: American Megatrends v: R0200Y2 date: 08/12/2008
Battery: ID-1: BAT0 charge: 71.3 Wh condition: 72.2/73.3 Wh (98%)
CPU: Info: Dual Core model: Intel Core2 Duo P8400 bits: 64 type: MCP L2 cache: 3 MiB
Speed: 1596 MHz min/max: 1600/2267 MHz Core speeds (MHz): 1: 1596 2: 1596
Graphics: Device-1: NVIDIA G98M [GeForce 9300M GS] driver: nouveau v: kernel
Device-2: Ricoh Visual Communication Camera VGP-VCC9 [R5U870] type: USB driver: uvcvideo
Display: x11 server: X.Org 1.20.10 driver: loaded: modesetting unloaded: fbdev,vesa resolution: 1680x945~60Hz
OpenGL: renderer: N/A v: N/A

As can be seen, it is a pretty ancient Sony laptop with an NVIDIA G98M graphics card. It uses the open NOUVEAU driver, which I actually did not
expect to work anymore on kernel 5.10 - but it does - at least for my “run-of-the-mill” type of usage (eg. no gaming!).

Can anybody tell me what - if any - newer proprietary NVIDIA driver might support this old graphics card on kernel 5.10?
sudo ubuntu-drivers devices returns

driver : nvidia-340 - distro non-free recommended and
driver : xserver-xorg-video-nouveau - distro free builtin.

Putting it differently: is there any driver - newer than nvidia-340 that supports the graphics car on
kernel 5.10?

Thanks for any hints.
Regards
H. Stoellinger

There is no newer driver available, and it will not work with the 5.10 kernel.
Is there any older kernel available in your distros repos?