The truthful answer is, (without doubt), definitely no
That said; from what I can tell the Billion 8900ax 2400 should be a good basis to build upon and it should be able to distribute the connection effectively and it may even have enough WiFi range..
I do tend to over engineer things to create spare capacity that may never be needed and I fully accept that it may be a sledge hammer to crack a walnut approach.
If my line was presently running well with the Fritzbox 7530; I may have gone down the Fritzbox Product Mesh or another Mesh System route but at present time my line is running very badly at about half of what it was with Sky with at least 25% a higher attenuation than there was with the Sky Q Router and/or with my previous TP Link VR2800 before the switch over. - (The present speeds are much lower with very erratic speeds and performance).
There is a lot that I do like about the Fritzbox 7530 and I have not completely ruled it out but some of the performance and the speed drop could be the change of router and a Billion 8900ax 2400 will rule that possibility out.
The ISP that I have just joined has a great reputation and I am reasonably confident/hopeful that they will sort it out these much worse than ever speed issues for me but if there is a slight chance that part of the problem is the Fritzbox 7530 Router\Chipset the Broadcom chipset in the Billion 8900ax 2400 should rule that possibility out.