What type of display does the Acer Aspire C24-1651-UR16 AIO Desktop have?

It has a 23.8" Full HD Widescreen IPS LED Back-lit Display.

What is the maximum turbo frequency of the Intel Core i5-1135G7 processor in this desktop?

The maximum turbo frequency of the Intel Core i5-1135G7 processor is up to 4.20 GHz.

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Breaking the boundaries of performance with the Intel Core i5-1135G7 Processor - up to 4.20 GHz, 4 cores, 8 threads, 8 MB Intel Smart Cache
Intel Iris Xe Graphics | 23.8" Full HD Widescreen IPS LED Back-lit Screen
8GB 2666MHz DDR4 Memory | 512GB NVMe M.2 SSD
Intel Wireless Wi-Fi 6 AX201 802.11ax Dual-Band 2.4GHz and 5GHz featuring 2x2 MU-MIMO technology | Bluetooth 5.1 | 10/100/1000 Gigabit Ethernet LAN
1 - Fully Functional Thunderbolt 4 Port (Rear) | 1 - USB 3.2 (Type A) Gen 1 port (Rear)
2 - USB 3.2 (Type A) Gen 2 ports (Rear)
1 - USB 2.0 (Type A) port (bottom, reseved for RF dongle) | 1 - HDMI-in Port (Rear)
1 - HDMI-out Port (Rear)
Integrated 1.0 MP HD Webcam with 2 Stereo Microphones | Wireless Keyboard and Mouse Included
Windows 10 Home